# sendRequest not possible in script console

**URL:** <https://forum.inductiveautomation.com/t/sendrequest-not-possible-in-script-console/110891>\
**Category:** Ignition\
**Tags:** ignition83\
**Created:** [September 23, 2025, 2:43pm UTC](https://forum.inductiveautomation.com/t/sendrequest-not-possible-in-script-console/110891 "2025-09-23T14:43:16Z")\
**Posts on this page:** 15\
**Page:** 1

<div class="post-metadata">

**Author:** ![Jean-Maurice\_Dubois](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/jean-maurice_dubois/32/80996_2.png) [@Jean-Maurice\_Dubois](https://forum.inductiveautomation.com/u/Jean-Maurice_Dubois)\
**Post date:** [September 23, 2025, 2:43pm UTC](https://forum.inductiveautomation.com/t/sendrequest-not-possible-in-script-console/110891/1 "2025-09-23T14:43:16Z")

</div>

```python
console code:

sd = system.date.parse('2025-09-23 08:00:00')
ed = system.date.parse('2025-09-23 10:00:00')
payl = {'startDate': sd, 'endDate': ed}

res = system.util.sendRequest(project="DATAHUB", messageHandler="pl3-prodOutput_McxPMP", payload=payl, remoteServer="ignition-vmappp043")

ERROR:

java.util.concurrent.ExecutionException: java.util.concurrent.ExecutionException: java.lang.ClassCastException: class java.util.Collections$UnmodifiableMap cannot be cast to class org.python.core.PyDictionary (java.util.Collections$UnmodifiableMap is in module java.base of loader 'bootstrap'; org.python.core.PyDictionary is in unnamed module of loader 'app')
>>>

```

---

<div class="post-metadata">

**Author:** ![bkarabinchak.psi](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/bkarabinchak.psi/32/83567_2.png) [@bkarabinchak.psi](https://forum.inductiveautomation.com/u/bkarabinchak.psi)\
**Post date:** [September 23, 2025, 2:55pm UTC](https://forum.inductiveautomation.com/t/sendrequest-not-possible-in-script-console/110891/2 "2025-09-23T14:55:13Z")

</div>

Show the code that handles the payload

---

<div class="post-metadata">

**Author:** ![Jean-Maurice\_Dubois](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/jean-maurice_dubois/32/80996_2.png) [@Jean-Maurice\_Dubois](https://forum.inductiveautomation.com/u/Jean-Maurice_Dubois)\
**Post date:** [September 23, 2025, 3:02pm UTC](https://forum.inductiveautomation.com/t/sendrequest-not-possible-in-script-console/110891/3 "2025-09-23T15:02:31Z")

</div>

the payload does not seems to be the problem: here another test:

no payload

 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/a/7/a70f9e6fde4b52dd5826c2614ade57a48aac31ca.png)

messageHandler only return a string :

 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/e/6/e637541321536829ca4ecda155d106ff97dccbe0.png)

---

<div class="post-metadata">

**Author:** ![paul-griffith](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/paul-griffith/32/37249_2.png) [@paul-griffith](https://forum.inductiveautomation.com/u/paul-griffith)\
**Post date:** [September 23, 2025, 3:29pm UTC](https://forum.inductiveautomation.com/t/sendrequest-not-possible-in-script-console/110891/4 "2025-09-23T15:29:39Z")

</div>

Can you copy the **entire** stacktrace you're getting in the script console and paste it here, in a preformatted text block?

That is, prefix with three ` symbols, and postfix with three ` symbols:

````
```
code
```

````

---

<div class="post-metadata">

**Author:** ![Jean-Maurice\_Dubois](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/jean-maurice_dubois/32/80996_2.png) [@Jean-Maurice\_Dubois](https://forum.inductiveautomation.com/u/Jean-Maurice_Dubois)\
**Post date:** [September 23, 2025, 4:00pm UTC](https://forum.inductiveautomation.com/t/sendrequest-not-possible-in-script-console/110891/5 "2025-09-23T16:00:02Z")

</div>

```python
Java Traceback:
Traceback (most recent call last):
  File "<input>", line 1, in <module>
	at java.base/java.util.concurrent.CompletableFuture.reportGet(Unknown Source)

	at java.base/java.util.concurrent.CompletableFuture.get(Unknown Source)

	at com.inductiveautomation.ignition.common.script.builtin.SystemUtilities.sendRequest(SystemUtilities.java:827)

	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)

	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)

	at java.base/java.lang.reflect.Method.invoke(Unknown Source)

java.util.concurrent.ExecutionException: java.util.concurrent.ExecutionException: java.lang.ClassCastException: class java.util.Collections$UnmodifiableMap cannot be cast to class org.python.core.PyDictionary (java.util.Collections$UnmodifiableMap is in module java.base of loader 'bootstrap'; org.python.core.PyDictionary is in unnamed module of loader 'app')

	at org.python.core.Py.JavaError(Py.java:545)

	at org.python.core.Py.JavaError(Py.java:536)

	at org.python.core.PyReflectedFunction. __call__ (PyReflectedFunction.java:192)

	at com.inductiveautomation.ignition.common.script.ScriptManager$ReflectedInstanceFunction. __call__ (ScriptManager.java:563)

	at org.python.core.PyObject. __call__ (PyObject.java:400)

	at org.python.pycode._pyx19.f$0(<input>:1)

	at org.python.pycode._pyx19.call_function(<input>)

	at org.python.core.PyTableCode.call(PyTableCode.java:173)

	at org.python.core.PyCode.call(PyCode.java:18)

	at org.python.core.Py.runCode(Py.java:1703)

	at org.python.core.Py.exec(Py.java:1747)

	at org.python.util.PythonInterpreter.exec(PythonInterpreter.java:277)

	at org.python.util.InteractiveInterpreter.runcode(InteractiveInterpreter.java:130)

	at com.inductiveautomation.ignition.designer.gui.tools.jythonconsole.JythonConsole$ConsoleWorker.doInBackground(JythonConsole.java:628)

	at com.inductiveautomation.ignition.designer.gui.tools.jythonconsole.JythonConsole$ConsoleWorker.doInBackground(JythonConsole.java:616)

	at java.desktop/javax.swing.SwingWorker$1.call(Unknown Source)

	at java.base/java.util.concurrent.FutureTask.run(Unknown Source)

	at java.desktop/javax.swing.SwingWorker.run(Unknown Source)

	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)

	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)

	at java.base/java.lang.Thread.run(Unknown Source)

Caused by: java.util.concurrent.ExecutionException: java.lang.ClassCastException: class java.util.Collections$UnmodifiableMap cannot be cast to class org.python.core.PyDictionary (java.util.Collections$UnmodifiableMap is in module java.base of loader 'bootstrap'; org.python.core.PyDictionary is in unnamed module of loader 'app')

	at java.base/java.util.concurrent.CompletableFuture.reportGet(Unknown Source)

	at java.base/java.util.concurrent.CompletableFuture.get(Unknown Source)

	at com.inductiveautomation.ignition.common.script.builtin.SystemUtilities.sendRequest(SystemUtilities.java:827)

	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)

	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)

	at java.base/java.lang.reflect.Method.invoke(Unknown Source)

	at org.python.core.PyReflectedFunction. __call__ (PyReflectedFunction.java:190)

	... 18 more

Caused by: java.lang.ClassCastException: class java.util.Collections$UnmodifiableMap cannot be cast to class org.python.core.PyDictionary (java.util.Collections$UnmodifiableMap is in module java.base of loader 'bootstrap'; org.python.core.PyDictionary is in unnamed module of loader 'app')

	at com.inductiveautomation.ignition.gateway.script.rpc.ScriptMessagingRpcImpl.extractPayload(ScriptMessagingRpcImpl.java:93)

	at com.inductiveautomation.ignition.gateway.script.rpc.ScriptMessagingRpcImpl.dispatchRequest(ScriptMessagingRpcImpl.java:69)

	at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(:0)

	at jdk.internal.reflect.NativeMethodAccessorImpl.invoke(:0)

	at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(:0)

	at java.lang.reflect.Method.invoke(:0)

	at com.inductiveautomation.ignition.gateway.rpc.RpcDelegate$DelegateRpcHandler.handle(RpcDelegate.java:271)

	at com.inductiveautomation.ignition.gateway.rpc.RpcRoutes.lambda$handle$1(RpcRoutes.java:199)

	at com.inductiveautomation.ignition.gateway.rpc.RpcRoutes.safelyHandle(RpcRoutes.java:219)

	at com.inductiveautomation.ignition.gateway.rpc.RpcRoutes.handle(RpcRoutes.java:198)

	at com.inductiveautomation.ignition.gateway.dataroutes.Route.service(Route.java:361)

	at com.inductiveautomation.ignition.gateway.dataroutes.RouteGroupImpl.service(RouteGroupImpl.java:120)

	at com.inductiveautomation.ignition.gateway.dataroutes.RouteGroupCollectionServlet.serviceInternal(RouteGroupCollectionServlet.java:133)

	at com.inductiveautomation.ignition.gateway.dataroutes.AbstractRouteGroupServlet.service(AbstractRouteGroupServlet.java:40)

	at jakarta.servlet.http.HttpServlet.service(HttpServlet.java:614)

	at org.eclipse.jetty.ee10.servlet.ServletHolder$NotAsync.service(ServletHolder.java:1379)

	at org.eclipse.jetty.ee10.servlet.ServletHolder.handle(ServletHolder.java:736)

	at org.eclipse.jetty.ee10.servlet.ServletHandler$ChainEnd.doFilter(ServletHandler.java:1614)

	at com.inductiveautomation.catapult.filters.GatewayFilter.doFilter(GatewayFilter.java:116)

	at jakarta.servlet.http.HttpFilter.doFilter(HttpFilter.java:97)

	at org.eclipse.jetty.ee10.servlet.FilterHolder.doFilter(FilterHolder.java:208)

	at org.eclipse.jetty.ee10.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1586)

	at org.eclipse.jetty.ee10.servlet.ServletHandler$MappedServlet.handle(ServletHandler.java:1547)

	at org.eclipse.jetty.ee10.servlet.ServletChannel.dispatch(ServletChannel.java:819)

	at org.eclipse.jetty.ee10.servlet.ServletChannel.handle(ServletChannel.java:436)

	at org.eclipse.jetty.ee10.servlet.ServletHandler.handle(ServletHandler.java:464)

	at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:575)

	at org.eclipse.jetty.ee10.servlet.SessionHandler.handle(SessionHandler.java:717)

	at org.eclipse.jetty.server.handler.ContextHandler.handle(ContextHandler.java:1060)

	at org.eclipse.jetty.rewrite.handler.RewriteHandler$LastRuleHandler.handle(RewriteHandler.java:159)

	at org.eclipse.jetty.rewrite.handler.Rule$Handler.handle(Rule.java:108)

	at org.eclipse.jetty.rewrite.handler.HeaderPatternRule$1.handle(HeaderPatternRule.java:89)

	at org.eclipse.jetty.rewrite.handler.Rule$Handler.handle(Rule.java:108)

	at org.eclipse.jetty.rewrite.handler.HeaderPatternRule$1.handle(HeaderPatternRule.java:89)

	at org.eclipse.jetty.rewrite.handler.Rule$Handler.handle(Rule.java:108)

	at org.eclipse.jetty.rewrite.handler.HeaderPatternRule$1.handle(HeaderPatternRule.java:89)

	at org.eclipse.jetty.rewrite.handler.Rule$Handler.handle(Rule.java:108)

	at org.eclipse.jetty.rewrite.handler.HeaderPatternRule$1.handle(HeaderPatternRule.java:89)

	at org.eclipse.jetty.rewrite.handler.Rule$Handler.handle(Rule.java:108)

	at org.eclipse.jetty.rewrite.handler.RewriteHandler.handle(RewriteHandler.java:143)

	at org.eclipse.jetty.server.Handler$Sequence.handle(Handler.java:805)

	at org.eclipse.jetty.server.Handler$Sequence.handle(Handler.java:805)

	at org.eclipse.jetty.server.Server.handle(Server.java:182)

	at org.eclipse.jetty.server.internal.HttpChannelState$HandlerInvoker.run(HttpChannelState.java:662)

	at org.eclipse.jetty.server.internal.HttpConnection.onFillable(HttpConnection.java:418)

	at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:322)

	at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:99)

	at org.eclipse.jetty.io.ssl.SslConnection$SslEndPoint.onFillable(SslConnection.java:575)

	at org.eclipse.jetty.io.ssl.SslConnection.onFillable(SslConnection.java:390)

	at org.eclipse.jetty.io.ssl.SslConnection$2.succeeded(SslConnection.java:150)

	at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:99)

	at org.eclipse.jetty.io.SelectableChannelEndPoint$1.run(SelectableChannelEndPoint.java:53)

	at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.runTask(AdaptiveExecutionStrategy.java:478)

	at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.consumeTask(AdaptiveExecutionStrategy.java:441)

	at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.tryProduce(AdaptiveExecutionStrategy.java:293)

	at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.run(AdaptiveExecutionStrategy.java:201)

	at org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:311)

	at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:979)

	at org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.doRunJob(QueuedThreadPool.java:1209)

	at org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.run(QueuedThreadPool.java:1164)

	at java.lang.Thread.run(:0)

Traceback (most recent call last):
  File "<input>", line 1, in <module>
	at java.base/java.util.concurrent.CompletableFuture.reportGet(Unknown Source)

	at java.base/java.util.concurrent.CompletableFuture.get(Unknown Source)

	at com.inductiveautomation.ignition.common.script.builtin.SystemUtilities.sendRequest(SystemUtilities.java:827)

	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)

	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)

	at java.base/java.lang.reflect.Method.invoke(Unknown Source)

java.util.concurrent.ExecutionException: java.util.concurrent.ExecutionException: java.lang.ClassCastException: class java.util.Collections$UnmodifiableMap cannot be cast to class org.python.core.PyDictionary (java.util.Collections$UnmodifiableMap is in module java.base of loader 'bootstrap'; org.python.core.PyDictionary is in unnamed module of loader 'app')

```

---

<div class="post-metadata">

**Author:** ![paul-griffith](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/paul-griffith/32/37249_2.png) [@paul-griffith](https://forum.inductiveautomation.com/u/paul-griffith)\
**Post date:** [September 23, 2025, 4:07pm UTC](https://forum.inductiveautomation.com/t/sendrequest-not-possible-in-script-console/110891/6 "2025-09-23T16:07:32Z")

</div>

Thanks, that helps a lot. We're looking into this internally.

---

<div class="post-metadata">

**Author:** ![paul-griffith](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/paul-griffith/32/37249_2.png) [@paul-griffith](https://forum.inductiveautomation.com/u/paul-griffith)\
**Post date:** [September 23, 2025, 4:12pm UTC](https://forum.inductiveautomation.com/t/sendrequest-not-possible-in-script-console/110891/7 "2025-09-23T16:12:07Z")

</div>

> [@Jean-Maurice\_Dubois](#):
>
> `remoteServer="ignition-vmappp043")`

~~Is this remote server running 8.1, or 8.3?~~ Looks like 8.3 based on your gateway events screenshot above...

---

<div class="post-metadata">

**Author:** ![Jean-Maurice\_Dubois](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/jean-maurice_dubois/32/80996_2.png) [@Jean-Maurice\_Dubois](https://forum.inductiveautomation.com/u/Jean-Maurice_Dubois)\
**Post date:** [September 23, 2025, 4:20pm UTC](https://forum.inductiveautomation.com/t/sendrequest-not-possible-in-script-console/110891/8 "2025-09-23T16:20:04Z")

</div>

all gtw are 8.3

---

<div class="post-metadata">

**Author:** ![paul-griffith](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/paul-griffith/32/37249_2.png) [@paul-griffith](https://forum.inductiveautomation.com/u/paul-griffith)\
**Post date:** [September 23, 2025, 11:11pm UTC](https://forum.inductiveautomation.com/t/sendrequest-not-possible-in-script-console/110891/9 "2025-09-23T23:11:49Z")

</div>

If you freshly launch the designer, does this problem still occur?  
If so, is there an error at the beginning of your designer's logging output with a message `Failed to retrieve script message encoding, defaulting to JSON`? If so, can you post the full related stacktrace here?

---

<div class="post-metadata">

**Author:** ![Jean-Maurice\_Dubois](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/jean-maurice_dubois/32/80996_2.png) [@Jean-Maurice\_Dubois](https://forum.inductiveautomation.com/u/Jean-Maurice_Dubois)\
**Post date:** [September 24, 2025, 11:38am UTC](https://forum.inductiveautomation.com/t/sendrequest-not-possible-in-script-console/110891/10 "2025-09-24T11:38:47Z")

</div>

If you mean the Output Console, no there isn’t.

 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/0/3/03b10cbb83749b1c9225de45a5a58244bc99d0e7.png)

still getting this error in Script Console

```python
Java Traceback:
Traceback (most recent call last):
  File "<input>", line 1, in <module>
	at java.base/java.util.concurrent.CompletableFuture.reportGet(Unknown Source)

	at java.base/java.util.concurrent.CompletableFuture.get(Unknown Source)

	at com.inductiveautomation.ignition.common.script.builtin.SystemUtilities.sendRequest(SystemUtilities.java:827)

	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)

	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)

	at java.base/java.lang.reflect.Method.invoke(Unknown Source)

java.util.concurrent.ExecutionException: java.util.concurrent.ExecutionException: java.lang.ClassCastException: class java.util.Collections$UnmodifiableMap cannot be cast to class org.python.core.PyDictionary (java.util.Collections$UnmodifiableMap is in module java.base of loader 'bootstrap'; org.python.core.PyDictionary is in unnamed module of loader 'app')

	at org.python.core.Py.JavaError(Py.java:545)

	at org.python.core.Py.JavaError(Py.java:536)

	at org.python.core.PyReflectedFunction. __call__ (PyReflectedFunction.java:192)

	at com.inductiveautomation.ignition.common.script.ScriptManager$ReflectedInstanceFunction. __call__ (ScriptManager.java:563)

	at org.python.core.PyObject. __call__ (PyObject.java:400)

	at org.python.pycode._pyx4.f$0(<input>:1)

	at org.python.pycode._pyx4.call_function(<input>)

	at org.python.core.PyTableCode.call(PyTableCode.java:173)

	at org.python.core.PyCode.call(PyCode.java:18)

	at org.python.core.Py.runCode(Py.java:1703)

	at org.python.core.Py.exec(Py.java:1747)

	at org.python.util.PythonInterpreter.exec(PythonInterpreter.java:277)

	at org.python.util.InteractiveInterpreter.runcode(InteractiveInterpreter.java:130)

	at com.inductiveautomation.ignition.designer.gui.tools.jythonconsole.JythonConsole$ConsoleWorker.doInBackground(JythonConsole.java:628)

	at com.inductiveautomation.ignition.designer.gui.tools.jythonconsole.JythonConsole$ConsoleWorker.doInBackground(JythonConsole.java:616)

	at java.desktop/javax.swing.SwingWorker$1.call(Unknown Source)

	at java.base/java.util.concurrent.FutureTask.run(Unknown Source)

	at java.desktop/javax.swing.SwingWorker.run(Unknown Source)

	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)

	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)

	at java.base/java.lang.Thread.run(Unknown Source)

Caused by: java.util.concurrent.ExecutionException: java.lang.ClassCastException: class java.util.Collections$UnmodifiableMap cannot be cast to class org.python.core.PyDictionary (java.util.Collections$UnmodifiableMap is in module java.base of loader 'bootstrap'; org.python.core.PyDictionary is in unnamed module of loader 'app')

	at java.base/java.util.concurrent.CompletableFuture.reportGet(Unknown Source)

	at java.base/java.util.concurrent.CompletableFuture.get(Unknown Source)

	at com.inductiveautomation.ignition.common.script.builtin.SystemUtilities.sendRequest(SystemUtilities.java:827)

	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)

	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)

	at java.base/java.lang.reflect.Method.invoke(Unknown Source)

	at org.python.core.PyReflectedFunction. __call__ (PyReflectedFunction.java:190)

	... 18 more

Caused by: java.lang.ClassCastException: class java.util.Collections$UnmodifiableMap cannot be cast to class org.python.core.PyDictionary (java.util.Collections$UnmodifiableMap is in module java.base of loader 'bootstrap'; org.python.core.PyDictionary is in unnamed module of loader 'app')

	at com.inductiveautomation.ignition.gateway.script.rpc.ScriptMessagingRpcImpl.extractPayload(ScriptMessagingRpcImpl.java:93)

	at com.inductiveautomation.ignition.gateway.script.rpc.ScriptMessagingRpcImpl.dispatchRequest(ScriptMessagingRpcImpl.java:69)

	at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(:0)

	at jdk.internal.reflect.NativeMethodAccessorImpl.invoke(:0)

	at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(:0)

	at java.lang.reflect.Method.invoke(:0)

	at com.inductiveautomation.ignition.gateway.rpc.RpcDelegate$DelegateRpcHandler.handle(RpcDelegate.java:271)

	at com.inductiveautomation.ignition.gateway.rpc.RpcRoutes.lambda$handle$1(RpcRoutes.java:199)

	at com.inductiveautomation.ignition.gateway.rpc.RpcRoutes.safelyHandle(RpcRoutes.java:219)

	at com.inductiveautomation.ignition.gateway.rpc.RpcRoutes.handle(RpcRoutes.java:198)

	at com.inductiveautomation.ignition.gateway.dataroutes.Route.service(Route.java:361)

	at com.inductiveautomation.ignition.gateway.dataroutes.RouteGroupImpl.service(RouteGroupImpl.java:120)

	at com.inductiveautomation.ignition.gateway.dataroutes.RouteGroupCollectionServlet.serviceInternal(RouteGroupCollectionServlet.java:133)

	at com.inductiveautomation.ignition.gateway.dataroutes.AbstractRouteGroupServlet.service(AbstractRouteGroupServlet.java:40)

	at jakarta.servlet.http.HttpServlet.service(HttpServlet.java:614)

	at org.eclipse.jetty.ee10.servlet.ServletHolder$NotAsync.service(ServletHolder.java:1379)

	at org.eclipse.jetty.ee10.servlet.ServletHolder.handle(ServletHolder.java:736)

	at org.eclipse.jetty.ee10.servlet.ServletHandler$ChainEnd.doFilter(ServletHandler.java:1614)

	at com.inductiveautomation.catapult.filters.GatewayFilter.doFilter(GatewayFilter.java:116)

	at jakarta.servlet.http.HttpFilter.doFilter(HttpFilter.java:97)

	at org.eclipse.jetty.ee10.servlet.FilterHolder.doFilter(FilterHolder.java:208)

	at org.eclipse.jetty.ee10.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1586)

	at org.eclipse.jetty.ee10.servlet.ServletHandler$MappedServlet.handle(ServletHandler.java:1547)

	at org.eclipse.jetty.ee10.servlet.ServletChannel.dispatch(ServletChannel.java:819)

	at org.eclipse.jetty.ee10.servlet.ServletChannel.handle(ServletChannel.java:436)

	at org.eclipse.jetty.ee10.servlet.ServletHandler.handle(ServletHandler.java:464)

	at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:575)

	at org.eclipse.jetty.ee10.servlet.SessionHandler.handle(SessionHandler.java:717)

	at org.eclipse.jetty.server.handler.ContextHandler.handle(ContextHandler.java:1060)

	at org.eclipse.jetty.rewrite.handler.RewriteHandler$LastRuleHandler.handle(RewriteHandler.java:159)

	at org.eclipse.jetty.rewrite.handler.Rule$Handler.handle(Rule.java:108)

	at org.eclipse.jetty.rewrite.handler.HeaderPatternRule$1.handle(HeaderPatternRule.java:89)

	at org.eclipse.jetty.rewrite.handler.Rule$Handler.handle(Rule.java:108)

	at org.eclipse.jetty.rewrite.handler.HeaderPatternRule$1.handle(HeaderPatternRule.java:89)

	at org.eclipse.jetty.rewrite.handler.Rule$Handler.handle(Rule.java:108)

	at org.eclipse.jetty.rewrite.handler.HeaderPatternRule$1.handle(HeaderPatternRule.java:89)

	at org.eclipse.jetty.rewrite.handler.Rule$Handler.handle(Rule.java:108)

	at org.eclipse.jetty.rewrite.handler.HeaderPatternRule$1.handle(HeaderPatternRule.java:89)

	at org.eclipse.jetty.rewrite.handler.Rule$Handler.handle(Rule.java:108)

	at org.eclipse.jetty.rewrite.handler.RewriteHandler.handle(RewriteHandler.java:143)

	at org.eclipse.jetty.server.Handler$Sequence.handle(Handler.java:805)

	at org.eclipse.jetty.server.Handler$Sequence.handle(Handler.java:805)

	at org.eclipse.jetty.server.Server.handle(Server.java:182)

	at org.eclipse.jetty.server.internal.HttpChannelState$HandlerInvoker.run(HttpChannelState.java:662)

	at org.eclipse.jetty.server.internal.HttpConnection.onFillable(HttpConnection.java:418)

	at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:322)

	at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:99)

	at org.eclipse.jetty.io.ssl.SslConnection$SslEndPoint.onFillable(SslConnection.java:575)

	at org.eclipse.jetty.io.ssl.SslConnection.onFillable(SslConnection.java:390)

	at org.eclipse.jetty.io.ssl.SslConnection$2.succeeded(SslConnection.java:150)

	at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:99)

	at org.eclipse.jetty.io.SelectableChannelEndPoint$1.run(SelectableChannelEndPoint.java:53)

	at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.runTask(AdaptiveExecutionStrategy.java:478)

	at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.consumeTask(AdaptiveExecutionStrategy.java:441)

	at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.tryProduce(AdaptiveExecutionStrategy.java:293)

	at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.run(AdaptiveExecutionStrategy.java:201)

	at org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:311)

	at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:979)

	at org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.doRunJob(QueuedThreadPool.java:1209)

	at org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.run(QueuedThreadPool.java:1164)

	at java.lang.Thread.run(:0)

Traceback (most recent call last):
  File "<input>", line 1, in <module>
	at java.base/java.util.concurrent.CompletableFuture.reportGet(Unknown Source)

	at java.base/java.util.concurrent.CompletableFuture.get(Unknown Source)

	at com.inductiveautomation.ignition.common.script.builtin.SystemUtilities.sendRequest(SystemUtilities.java:827)

	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)

	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)

	at java.base/java.lang.reflect.Method.invoke(Unknown Source)

java.util.concurrent.ExecutionException: java.util.concurrent.ExecutionException: java.lang.ClassCastException: class java.util.Collections$UnmodifiableMap cannot be cast to class org.python.core.PyDictionary (java.util.Collections$UnmodifiableMap is in module java.base of loader 'bootstrap'; org.python.core.PyDictionary is in unnamed module of loader 'app')

```

I don’t see anything in the gateway logs either.

---

<div class="post-metadata">

**Author:** ![Jean-Maurice\_Dubois](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/jean-maurice_dubois/32/80996_2.png) [@Jean-Maurice\_Dubois](https://forum.inductiveautomation.com/u/Jean-Maurice_Dubois)\
**Post date:** [September 24, 2025, 11:41am UTC](https://forum.inductiveautomation.com/t/sendrequest-not-possible-in-script-console/110891/11 "2025-09-24T11:41:13Z")

</div>

```python
java.lang.ClassCastException: class java.util.Collections$UnmodifiableMap cannot be cast to class org.python.core.PyDictionary (java.util.Collections$UnmodifiableMap is in module java.base of loader 'bootstrap'; org.python.core.PyDictionary is in unnamed module of loader 'app')

at com.inductiveautomation.ignition.gateway.script.rpc.ScriptMessagingRpcImpl.extractPayload(ScriptMessagingRpcImpl.java:93)

at com.inductiveautomation.ignition.gateway.script.rpc.ScriptMessagingRpcImpl.dispatchRequest(ScriptMessagingRpcImpl.java:69)

at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)

at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)

at java.base/java.lang.reflect.Method.invoke(Unknown Source)

at com.inductiveautomation.ignition.gateway.rpc.RpcDelegate$DelegateRpcHandler.handle(RpcDelegate.java:271)

at com.inductiveautomation.ignition.gateway.rpc.RpcRoutes.lambda$handle$1(RpcRoutes.java:199)

at com.inductiveautomation.ignition.gateway.rpc.RpcRoutes.safelyHandle(RpcRoutes.java:219)

at com.inductiveautomation.ignition.gateway.rpc.RpcRoutes.handle(RpcRoutes.java:198)

at com.inductiveautomation.ignition.gateway.dataroutes.Route.service(Route.java:361)

at com.inductiveautomation.ignition.gateway.dataroutes.RouteGroupImpl.service(RouteGroupImpl.java:120)

at com.inductiveautomation.ignition.gateway.dataroutes.RouteGroupCollectionServlet.serviceInternal(RouteGroupCollectionServlet.java:133)

at com.inductiveautomation.ignition.gateway.dataroutes.AbstractRouteGroupServlet.service(AbstractRouteGroupServlet.java:40)

at jakarta.servlet.http.HttpServlet.service(HttpServlet.java:614)

at org.eclipse.jetty.ee10.servlet.ServletHolder$NotAsync.service(ServletHolder.java:1379)

at org.eclipse.jetty.ee10.servlet.ServletHolder.handle(ServletHolder.java:736)

at org.eclipse.jetty.ee10.servlet.ServletHandler$ChainEnd.doFilter(ServletHandler.java:1614)

at com.inductiveautomation.catapult.filters.GatewayFilter.doFilter(GatewayFilter.java:116)

at jakarta.servlet.http.HttpFilter.doFilter(HttpFilter.java:97)

at org.eclipse.jetty.ee10.servlet.FilterHolder.doFilter(FilterHolder.java:208)

at org.eclipse.jetty.ee10.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1586)

at org.eclipse.jetty.ee10.servlet.ServletHandler$MappedServlet.handle(ServletHandler.java:1547)

at org.eclipse.jetty.ee10.servlet.ServletChannel.dispatch(ServletChannel.java:819)

at org.eclipse.jetty.ee10.servlet.ServletChannel.handle(ServletChannel.java:436)

at org.eclipse.jetty.ee10.servlet.ServletHandler.handle(ServletHandler.java:464)

at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:575)

at org.eclipse.jetty.ee10.servlet.SessionHandler.handle(SessionHandler.java:717)

at org.eclipse.jetty.server.handler.ContextHandler.handle(ContextHandler.java:1060)

at org.eclipse.jetty.rewrite.handler.RewriteHandler$LastRuleHandler.handle(RewriteHandler.java:159)

at org.eclipse.jetty.rewrite.handler.Rule$Handler.handle(Rule.java:108)

at org.eclipse.jetty.rewrite.handler.HeaderPatternRule$1.handle(HeaderPatternRule.java:89)

at org.eclipse.jetty.rewrite.handler.Rule$Handler.handle(Rule.java:108)

at org.eclipse.jetty.rewrite.handler.HeaderPatternRule$1.handle(HeaderPatternRule.java:89)

at org.eclipse.jetty.rewrite.handler.Rule$Handler.handle(Rule.java:108)

at org.eclipse.jetty.rewrite.handler.HeaderPatternRule$1.handle(HeaderPatternRule.java:89)

at org.eclipse.jetty.rewrite.handler.Rule$Handler.handle(Rule.java:108)

at org.eclipse.jetty.rewrite.handler.HeaderPatternRule$1.handle(HeaderPatternRule.java:89)

at org.eclipse.jetty.rewrite.handler.Rule$Handler.handle(Rule.java:108)

at org.eclipse.jetty.rewrite.handler.RewriteHandler.handle(RewriteHandler.java:143)

at org.eclipse.jetty.server.Handler$Sequence.handle(Handler.java:805)

at org.eclipse.jetty.server.Handler$Sequence.handle(Handler.java:805)

at org.eclipse.jetty.server.Server.handle(Server.java:182)

at org.eclipse.jetty.server.internal.HttpChannelState$HandlerInvoker.run(HttpChannelState.java:662)

at org.eclipse.jetty.server.internal.HttpConnection.onFillable(HttpConnection.java:418)

at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:322)

at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:99)

at org.eclipse.jetty.io.ssl.SslConnection$SslEndPoint.onFillable(SslConnection.java:575)

at org.eclipse.jetty.io.ssl.SslConnection.onFillable(SslConnection.java:390)

at org.eclipse.jetty.io.ssl.SslConnection$2.succeeded(SslConnection.java:150)

at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:99)

at org.eclipse.jetty.io.SelectableChannelEndPoint$1.run(SelectableChannelEndPoint.java:53)

at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.runTask(AdaptiveExecutionStrategy.java:478)

at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.consumeTask(AdaptiveExecutionStrategy.java:441)

at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.tryProduce(AdaptiveExecutionStrategy.java:293)

at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.run(AdaptiveExecutionStrategy.java:201)

at org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:311)

at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:979)

at org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.doRunJob(QueuedThreadPool.java:1209)

at org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.run(QueuedThreadPool.java:1164)

at java.base/java.lang.Thread.run(Unknown Source)

```

in gateway logs

![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/e/0/e0a5955f98d99b937b7f5b8f054b84a4e87016e4.png)

💁‍♂️ not sure, this warning only appeared once. Even if I did multiple sendRequest.

---

<div class="post-metadata">

**Author:** ![paul-griffith](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/paul-griffith/32/37249_2.png) [@paul-griffith](https://forum.inductiveautomation.com/u/paul-griffith)\
**Post date:** [September 24, 2025, 3:38pm UTC](https://forum.inductiveautomation.com/t/sendrequest-not-possible-in-script-console/110891/12 "2025-09-24T15:38:09Z")

</div>

Can you direct message me your full system logs? I can't tell whether that gateway error is relevant or not, and there might be other information that's also useful.

---

<div class="post-metadata">

**Author:** ![paul-griffith](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/paul-griffith/32/37249_2.png) [@paul-griffith](https://forum.inductiveautomation.com/u/paul-griffith)\
**Post date:** [September 24, 2025, 6:07pm UTC](https://forum.inductiveautomation.com/t/sendrequest-not-possible-in-script-console/110891/13 "2025-09-24T18:07:04Z")

</div>

Thanks, I was able to figure out the root cause and work out a fix. Hopefully will get in to 8.3.1, if not 8.3.2.

If you restart the gateway and the designer, it should work consistently until/unless you change the 'Script Message Encoding' property in the gateway settings.

---

<div class="post-metadata">

**Author:** ![Jean-Maurice\_Dubois](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/jean-maurice_dubois/32/80996_2.png) [@Jean-Maurice\_Dubois](https://forum.inductiveautomation.com/u/Jean-Maurice_Dubois)\
**Post date:** [September 25, 2025, 12:03pm UTC](https://forum.inductiveautomation.com/t/sendrequest-not-possible-in-script-console/110891/14 "2025-09-25T12:03:52Z")

</div>

Ok thank you Paul, I will be able to restart this weekend.

---

<div class="post-metadata">

**Author:** ![paul-griffith](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/paul-griffith/32/37249_2.png) [@paul-griffith](https://forum.inductiveautomation.com/u/paul-griffith)\
**Post date:** [September 26, 2025, 3:34pm UTC](https://forum.inductiveautomation.com/t/sendrequest-not-possible-in-script-console/110891/15 "2025-09-26T15:34:34Z")

</div>

This fix has been merged, so this will be fixed as of 8.3.1.