system.tag.browseConfiguration error

Ignition
1

We are running ignition 7.9.9. When running system.tag.browseConfiguration on a tag folder, I’m getting the stack trace below. I’ve used this function plenty of times without issue and it seems to be isolated to just a few folders of tags. Has anyone seen this before?

Java Traceback:

	at org.python.core.Py.JavaError(Py.java:495)
	at com.inductiveautomation.ignition.client.script.ClientTagUtilities.browseConfiguration(ClientTagUtilities.java:445)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.python.core.PyReflectedFunction.__call__(PyReflectedFunction.java:186)
	at com.inductiveautomation.ignition.common.script.ScriptManager$ReflectedInstanceFunction.__call__(ScriptManager.java:431)
	at org.python.core.PyObject.__call__(PyObject.java:404)
	at org.python.core.PyObject.__call__(PyObject.java:408)
	at org.python.pycode._pyx81.f$0(<buffer>:1)
	at org.python.pycode._pyx81.call_function(<buffer>)
	at org.python.core.PyTableCode.call(PyTableCode.java:165)
	at org.python.core.PyCode.call(PyCode.java:18)
	at org.python.core.Py.runCode(Py.java:1275)
	at org.python.core.Py.exec(Py.java:1319)
	at org.python.util.PythonInterpreter.exec(PythonInterpreter.java:215)
	at org.python.util.InteractiveInterpreter.runcode(InteractiveInterpreter.java:89)
	at org.python.util.InteractiveInterpreter.runsource(InteractiveInterpreter.java:70)
	at com.inductiveautomation.ignition.designer.gui.tools.jythonconsole.JythonConsole$InterpreterWorker.doInBackground(JythonConsole.java:476)
	at com.inductiveautomation.ignition.designer.gui.tools.jythonconsole.JythonConsole$InterpreterWorker.doInBackground(JythonConsole.java:464)
	at javax.swing.SwingWorker$1.call(SwingWorker.java:295)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at javax.swing.SwingWorker.run(SwingWorker.java:334)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
Caused by: com.inductiveautomation.ignition.client.gateway_interface.GatewayException: java.lang.ClassCastException: Value does not map to an element in the array.
	at com.inductiveautomation.ignition.client.gateway_interface.GatewayInterface.newGatewayException(GatewayInterface.java:341)
	at com.inductiveautomation.ignition.client.gateway_interface.GatewayInterface.sendMessage(GatewayInterface.java:315)
	at com.inductiveautomation.ignition.client.gateway_interface.GatewayInterface.sendMessage(GatewayInterface.java:268)
	at com.inductiveautomation.ignition.client.gateway_interface.GatewayInterface.invoke(GatewayInterface.java:894)
	at com.inductiveautomation.ignition.client.script.ClientTagUtilities.browseConfiguration(ClientTagUtilities.java:442)
	... 25 more
Caused by: java.lang.RuntimeException: java.lang.ClassCastException: Value does not map to an element in the array.
	at com.inductiveautomation.ignition.gateway.tags.config.TagConfigurationUtils.browseConfiguration(TagConfigurationUtils.java:437)
	at com.inductiveautomation.ignition.gateway.tags.config.TagConfigurationUtils.browseConfiguration(TagConfigurationUtils.java:408)
	at com.inductiveautomation.ignition.gateway.servlets.gateway.functions.SQLTags.browseConfiguration(SQLTags.java:560)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(null)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(null)
	at java.lang.reflect.Method.invoke(null)
	at com.inductiveautomation.ignition.gateway.servlets.gateway.AbstractGatewayFunction.invoke(AbstractGatewayFunction.java:208)
	at com.inductiveautomation.ignition.gateway.servlets.Gateway.doPost(Gateway.java:404)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:707)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
	at com.inductiveautomation.ignition.gateway.bootstrap.MapServlet.service(MapServlet.java:85)
	at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:837)
	at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:583)
	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
	at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:548)
	at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:226)
	at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1160)
	at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:511)
	at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:185)
	at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1092)
	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
	at org.eclipse.jetty.server.handler.HandlerList.handle(HandlerList.java:52)
	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:134)
	at org.eclipse.jetty.server.Server.handle(Server.java:518)
	at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:308)
	at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:244)
	at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:273)
	at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:95)
	at org.eclipse.jetty.io.ssl.SslConnection.onFillable(SslConnection.java:186)
	at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:273)
	at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:95)
	at org.eclipse.jetty.io.SelectChannelEndPoint$2.run(SelectChannelEndPoint.java:93)
	at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.produceAndRun(ExecuteProduceConsume.java:246)
	at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.run(ExecuteProduceConsume.java:156)
	at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:654)
	at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:572)
	at java.lang.Thread.run(null)
Traceback (most recent call last):
  File "<buffer>", line 1, in <module>
	at com.inductiveautomation.ignition.client.gateway_interface.GatewayInterface.newGatewayException(GatewayInterface.java:341)
	at com.inductiveautomation.ignition.client.gateway_interface.GatewayInterface.sendMessage(GatewayInterface.java:315)
	at com.inductiveautomation.ignition.client.gateway_interface.GatewayInterface.sendMessage(GatewayInterface.java:268)
	at com.inductiveautomation.ignition.client.gateway_interface.GatewayInterface.invoke(GatewayInterface.java:894)
	at com.inductiveautomation.ignition.client.script.ClientTagUtilities.browseConfiguration(ClientTagUtilities.java:442)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)

com.inductiveautomation.ignition.client.gateway_interface.GatewayException: com.inductiveautomation.ignition.client.gateway_interface.GatewayException: java.lang.ClassCastException: Value does not map to an element in the array.
2

I know this is an old post, but we came across this exact error recently as well. It took me quite a bit to figure it out, but it basically came down to having a UDT definition that somehow got into a bad state. In our case, it was an XML import for a UDT definition that had a bad ExpressionType property / value.

Normally, the ExpressionType property should have a value of 1 if it contains an actual expression. Otherwise, if there isn’t an expression, I believe that property is absent. We had a series of OPC tagtype tags that all had an ExpressionType property value ranging from 1 to 30 or so. It seems as though the XML import still works with these errant property values, and the OPC tags even appear to function quite normally on the UDT instances as well. However it errors out when running the system.tag.browseConfiguration function. I’m guessing this is possibly a small bug in the import routine.

I would suggest you export out the tags or parent UDT definition, and see if you can spot anything that looks out of place. An alternative could be to manually rebuild the UDT definition or tags to see if you receive the same errors when running browseConfiguration on it. This is how I finally found our issue.

3

Thanks for the reply. I think we came to the same conclusion. We had a bad XML import. I don’t think the validation of tag imports is strict enough.