# Error capture on user.sendRequest **URL:** \ **Category:** Ignition\ **Created:** [November 13, 2025, 8:26pm UTC](https://forum.inductiveautomation.com/t/error-capture-on-user-sendrequest/112169 "2025-11-13T20:26:00Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![bwirth](https://avatars.discourse-cdn.com/v4/letter/b/41988e/32.png) [@bwirth](https://forum.inductiveautomation.com/u/bwirth)\ **Post date:** [November 13, 2025, 8:26pm UTC](https://forum.inductiveautomation.com/t/error-capture-on-user-sendrequest/112169/1 "2025-11-13T20:26:00Z")
I’m not having luck capturing the error on a system.util.sendRequest call. On the “GoodServer” the handler exists and functions properly. On the “BadServer” the function fails and reports a “Remote Exception”. The I’m just trying to capture this exception and move on in the script but it does not appear to work in a try block… Something I’m missing? ```python tagPath = '[MQTT Engine]Edge Nodes/Some/Tag/Path' server = 'GoodServer' server = 'BadServer' try : result = system.util.sendRequest('Edge', 'checkPathAlarms', payload = { 'tagPath' : tagPath }, remoteServer = server, timeoutSec = 5 ) except Exception as e : pass print "Error sending request to %s: %s" %(server,e) result = None if result > 0 : print "Checking %d tags with alerms"%result else : print "nothing to process" ``` Error: (The handler isn’t there and I know it isn’t there, I’m just trying to not tank the script when it happens) ```python >>> Java Traceback: Traceback (most recent call last): File "", line 6, in File "", line 6, in at com.inductiveautomation.ignition.client.gateway_interface.GatewayInterface.newGatewayException(GatewayInterface.java:360) at com.inductiveautomation.ignition.client.gateway_interface.GatewayInterface.sendMessage(GatewayInterface.java:330) at com.inductiveautomation.ignition.client.gateway_interface.GatewayInterface.sendMessage(GatewayInterface.java:287) at com.inductiveautomation.ignition.client.gateway_interface.GatewayInterface.invoke(GatewayInterface.java:967) at com.inductiveautomation.ignition.client.script.DesignerSystemUtilities$SendRequestManager.invokeRequest(DesignerSystemUtilities.java:388) at com.inductiveautomation.ignition.client.script.DesignerSystemUtilities.sendRequestInternal(DesignerSystemUtilities.java:217) at com.inductiveautomation.ignition.common.script.builtin.SystemUtilities.sendRequestInternal(SystemUtilities.java:912) at com.inductiveautomation.ignition.common.script.builtin.SystemUtilities.sendRequest(SystemUtilities.java:833) at jdk.internal.reflect.GeneratedMethodAccessor151.invoke(Unknown Source) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.base/java.lang.reflect.Method.invoke(Unknown Source) com.inductiveautomation.ignition.client.gateway_interface.GatewayException: com.inductiveautomation.ignition.client.gateway_interface.GatewayException: Remote exception: com.inductiveautomation.ignition.common.script.message.MessageHandlerException: The message handler "checkPathAlarms" could not be found! Check your event script message handlers. at org.python.core.Py.JavaError(Py.java:545) at org.python.core.Py.JavaError(Py.java:536) at org.python.core.PyReflectedFunction. __call__ (PyReflectedFunction.java:192) at com.inductiveautomation.ignition.common.script.ScriptManager$ReflectedInstanceFunction. __call__ (ScriptManager.java:553) at org.python.core.PyObject. __call__ (PyObject.java:400) at org.python.pycode._pyx438.f$0(:17) at org.python.pycode._pyx438.call_function() at org.python.core.PyTableCode.call(PyTableCode.java:173) at org.python.core.PyCode.call(PyCode.java:18) at org.python.core.Py.runCode(Py.java:1703) at org.python.core.Py.exec(Py.java:1747) at org.python.util.PythonInterpreter.exec(PythonInterpreter.java:277) at org.python.util.InteractiveInterpreter.runcode(InteractiveInterpreter.java:130) at com.inductiveautomation.ignition.designer.gui.tools.jythonconsole.JythonConsole$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: com.inductiveautomation.ignition.client.gateway_interface.GatewayException: Remote exception: com.inductiveautomation.ignition.common.script.message.MessageHandlerException: The message handler "checkPathAlarms" could not be found! Check your event script message handlers. at com.inductiveautomation.ignition.client.gateway_interface.GatewayInterface.newGatewayException(GatewayInterface.java:360) at com.inductiveautomation.ignition.client.gateway_interface.GatewayInterface.sendMessage(GatewayInterface.java:330) at com.inductiveautomation.ignition.client.gateway_interface.GatewayInterface.sendMessage(GatewayInterface.java:287) at com.inductiveautomation.ignition.client.gateway_interface.GatewayInterface.invoke(GatewayInterface.java:967) at com.inductiveautomation.ignition.client.script.DesignerSystemUtilities$SendRequestManager.invokeRequest(DesignerSystemUtilities.java:388) at com.inductiveautomation.ignition.client.script.DesignerSystemUtilities.sendRequestInternal(DesignerSystemUtilities.java:217) at com.inductiveautomation.ignition.common.script.builtin.SystemUtilities.sendRequestInternal(SystemUtilities.java:912) at com.inductiveautomation.ignition.common.script.builtin.SystemUtilities.sendRequest(SystemUtilities.java:833) at jdk.internal.reflect.GeneratedMethodAccessor151.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.Exception com.inductiveautomation.ignition.common.GenericTransferrableException: Remote exception: com.inductiveautomation.ignition.common.script.message.MessageHandlerException: The message handler "checkPathAlarms" could not be found! Check your event script message handlers. at com.inductiveautomation.ignition.gateway.clientcomm.scriptmsg.AbstractScriptRequestIntent.processInternal(AbstractScriptRequestIntent.java:41) at com.inductiveautomation.ignition.gateway.clientcomm.scriptmsg.ScriptRequestIntent.receive(ScriptRequestIntent.java:29) at com.inductiveautomation.ignition.gateway.clientcomm.scriptmsg.ScriptRequestIntent.receive(ScriptRequestIntent.java:12) at com.inductiveautomation.metro.impl.CentralManagerImpl.handleLocal(CentralManagerImpl.java:483) at com.inductiveautomation.metro.impl.ConnectionWatcher.handle(ConnectionWatcher.java:502) at com.inductiveautomation.metro.impl.ConnectionWatcher.handle(ConnectionWatcher.java:49) at com.inductiveautomation.metro.impl.protocol.websocket.WebSocketConnection.forward(WebSocketConnection.java:1446) at com.inductiveautomation.metro.impl.protocol.websocket.WebSocketConnection.onDataReceived(WebSocketConnection.java:1339) at com.inductiveautomation.metro.impl.protocol.websocket.servlet.DataChannelServlet.doPost(DataChannelServlet.java:268) at javax.servlet.http.HttpServlet.service(HttpServlet.java:523) at com.inductiveautomation.metro.impl.protocol.websocket.servlet.DataChannelServlet.service(DataChannelServlet.java:195) at javax.servlet.http.HttpServlet.service(HttpServlet.java:590) at com.inductiveautomation.ignition.gateway.bootstrap.MapServlet.service(MapServlet.java:86) at org.eclipse.jetty.servlet.ServletHolder$NotAsync.service(ServletHolder.java:1410) at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:764) at org.eclipse.jetty.servlet.ServletHandler$ChainEnd.doFilter(ServletHandler.java:1665) at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:527) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:131) at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:598) at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:122) at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:223) at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1580) at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:221) at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1384) at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:176) at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:484) at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1553) at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:174) at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1306) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:129) at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:122) at com.inductiveautomation.catapult.handlers.RemoteHostNameLookupHandler.handle(RemoteHostNameLookupHandler.java:121) at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:122) at org.eclipse.jetty.rewrite.handler.RewriteHandler.handle(RewriteHandler.java:301) at org.eclipse.jetty.server.handler.HandlerList.handle(HandlerList.java:51) at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:141) at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:122) at org.eclipse.jetty.server.Server.handle(Server.java:563) at org.eclipse.jetty.server.HttpChannel$RequestDispatchable.dispatch(HttpChannel.java:1598) at org.eclipse.jetty.server.HttpChannel.dispatch(HttpChannel.java:753) at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:501) at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:287) at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:314) at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:100) at org.eclipse.jetty.io.ssl.SslConnection$DecryptedEndPoint.onFillable(SslConnection.java:558) at org.eclipse.jetty.io.ssl.SslConnection.onFillable(SslConnection.java:379) at org.eclipse.jetty.io.ssl.SslConnection$2.succeeded(SslConnection.java:146) at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:100) at org.eclipse.jetty.io.SelectableChannelEndPoint$1.run(SelectableChannelEndPoint.java:53) at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.runTask(AdaptiveExecutionStrategy.java:421) at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.consumeTask(AdaptiveExecutionStrategy.java:390) at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.tryProduce(AdaptiveExecutionStrategy.java:277) at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.run(AdaptiveExecutionStrategy.java:199) at org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:411) at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:969) at org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.doRunJob(QueuedThreadPool.java:1194) at org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.run(QueuedThreadPool.java:1149) at java.base/java.lang.Thread.run(Unknown Source) Traceback (most recent call last): File "", line 6, in File "", line 6, in at com.inductiveautomation.ignition.client.gateway_interface.GatewayInterface.newGatewayException(GatewayInterface.java:360) at com.inductiveautomation.ignition.client.gateway_interface.GatewayInterface.sendMessage(GatewayInterface.java:330) at com.inductiveautomation.ignition.client.gateway_interface.GatewayInterface.sendMessage(GatewayInterface.java:287) at com.inductiveautomation.ignition.client.gateway_interface.GatewayInterface.invoke(GatewayInterface.java:967) at com.inductiveautomation.ignition.client.script.DesignerSystemUtilities$SendRequestManager.invokeRequest(DesignerSystemUtilities.java:388) at com.inductiveautomation.ignition.client.script.DesignerSystemUtilities.sendRequestInternal(DesignerSystemUtilities.java:217) at com.inductiveautomation.ignition.common.script.builtin.SystemUtilities.sendRequestInternal(SystemUtilities.java:912) at com.inductiveautomation.ignition.common.script.builtin.SystemUtilities.sendRequest(SystemUtilities.java:833) at jdk.internal.reflect.GeneratedMethodAccessor151.invoke(Unknown Source) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.base/java.lang.reflect.Method.invoke(Unknown Source) com.inductiveautomation.ignition.client.gateway_interface.GatewayException: com.inductiveautomation.ignition.client.gateway_interface.GatewayException: Remote exception: com.inductiveautomation.ignition.common.script.message.MessageHandlerException: The message handler "checkPathAlarms" could not be found! Check your event script message handlers. >>> ``` ---
**Author:** ![ryan.white](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/ryan.white/32/73193_2.png) [@ryan.white](https://forum.inductiveautomation.com/u/ryan.white)\ **Post date:** [November 13, 2025, 8:28pm UTC](https://forum.inductiveautomation.com/t/error-capture-on-user-sendrequest/112169/2 "2025-11-13T20:28:30Z")
Thats a java error, you need to catch those separately from python errors add ```python except java.lang.Throwable as e: # handle error here ``` to your `try ... except` block. > [@Catching a tag write timeout exception](https://forum.inductiveautomation.com/t/catching-a-tag-write-timeout-exception/49813/2): > > Generally speaking try/except will only catch python errors. To catch java errors in Ignition, you have to import them, for instance to catch an error that the database throws you would need import java.lang.Exception try: system.db.runUpdateQuery("somequery") except Exception, e: ## catches python errors except java.lang.Exception, e: ## Catches database thrown errors Looking at your stack trace it looks like ultimately you get java.util.concurrent.TimeoutException so that is the exceptio… ---
**Author:** ![bwirth](https://avatars.discourse-cdn.com/v4/letter/b/41988e/32.png) [@bwirth](https://forum.inductiveautomation.com/u/bwirth)\ **Post date:** [November 13, 2025, 8:33pm UTC](https://forum.inductiveautomation.com/t/error-capture-on-user-sendrequest/112169/3 "2025-11-13T20:33:37Z")
> [@ryan.white](#): > > `Throwable ` Thank you, sir! You are a gentleman and a scholar!