Ignition SCADA perspective compile error (Motor circuit)

neon93dx · April 15, 2025, 2:55pm

'm trying to get a script running when i pressed the button on my circuit which runs a motor, the script is tied to onActionPerformed event, but when I run it, it gives me this error. The tags are correct and inserted in the script correctly.

"Unable to run action 'component.onActionPerformed' on MotorControl@D/root/Button: code could not be compiled."

The code for this event is:

def runAction(self, event):
    # Define the tag paths for motor control and motor running time
    motorStatusTagPath = "[default]My_Tags/Motor_Status"  
    # Motor control tag (on/off)
    runningTimeTagPath = "[default]My_Tags/Motor_RunningTime"  
    # Motor running time tag
    # Read the current motor status (True = running, False = stopped)
    currentMotorState = system.tag.readBlocking([motorStatusTagPath])[0].value

    # Read the current motor running time
    currentRunningTime = system.tag.readBlocking([runningTimeTagPath])[0].value

    # Toggle the motor state (on/off)
    system.tag.writeBlocking([motorStatusTagPath], [not currentMotorState])

    # If the motor is running, increment the running time by 1 (you can adjust the increment value 
    as needed)
    if not currentMotorState:  
    # If the motor is turned on
    system.tag.writeBlocking([runningTimeTagPath], [currentRunningTime + 1])  
    # Increase running time

Transistor · April 15, 2025, 3:01pm

Check the third comment line from end doesn't have a line break in front of "as needed)".
Your last line of code should be indented for the if logic.

neon93dx · April 15, 2025, 3:35pm

org.python.core.PySyntaxError
  File "<function:runAction>", line 2
    testTagPath = "[default]My_Tags/Motor_Status"
    ^
SyntaxError: mismatched input 'testTagPath' expecting INDENT

	at org.python.core.ParserFacade.fixParseError(ParserFacade.java:95)
	at org.python.core.ParserFacade.parse(ParserFacade.java:205)
	at org.python.core.Py.compile_flags(Py.java:2269)
	at com.inductiveautomation.ignition.common.script.ScriptManager.compileFunction(ScriptManager.java:899)
	at com.inductiveautomation.ignition.gateway.project.ProjectScriptLifecycle$TrackingProjectScriptManager.compileFunctionSuper(ProjectScriptLifecycle.java:825)
	at com.inductiveautomation.ignition.gateway.project.ProjectScriptLifecycle$AutoRecompilingScriptFunction.getOrCreateDelegate(ProjectScriptLifecycle.java:941)
	at com.inductiveautomation.ignition.gateway.project.ProjectScriptLifecycle$AutoRecompilingScriptFunction.<init>(ProjectScriptLifecycle.java:932)
	at com.inductiveautomation.ignition.gateway.project.ProjectScriptLifecycle$TrackingProjectScriptManager.compileFunction(ProjectScriptLifecycle.java:805)
	at com.inductiveautomation.ignition.common.script.ScriptManager.compileFunction(ScriptManager.java:882)
	at com.inductiveautomation.perspective.gateway.script.ScriptFunctionHelper.lambda$invoke$0(ScriptFunctionHelper.java:115)
	at java.base/java.util.concurrent.atomic.AtomicReference.updateAndGet(Unknown Source)
	at com.inductiveautomation.perspective.gateway.script.ScriptFunctionHelper.invoke(ScriptFunctionHelper.java:108)
	at com.inductiveautomation.perspective.gateway.script.ScriptFunctionHelper.invoke(ScriptFunctionHelper.java:98)
	at com.inductiveautomation.perspective.gateway.action.ScriptAction.runAction(ScriptAction.java:80)
	at com.inductiveautomation.perspective.gateway.model.ActionCollection$ActionSequence$ExecuteActionsTask.lambda$call$0(ActionCollection.java:263)
	at com.inductiveautomation.perspective.gateway.api.LoggingContext.mdc(LoggingContext.java:54)
	at com.inductiveautomation.perspective.gateway.model.ActionCollection$ActionSequence$ExecuteActionsTask.call(ActionCollection.java:252)
	at com.inductiveautomation.perspective.gateway.model.ActionCollection$ActionSequence$ExecuteActionsTask.call(ActionCollection.java:221)
	at com.inductiveautomation.perspective.gateway.threading.BlockingTaskQueue$TaskWrapper.run(BlockingTaskQueue.java:154)
	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
	at java.base/java.util.concurrent.FutureTask.run(Unknown Source)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
	at com.inductiveautomation.perspective.gateway.threading.BlockingWork$BlockingWorkRunnable.run(BlockingWork.java:58)
	at java.base/java.lang.Thread.run(Unknown Source)

Ignition v8.1.47 (b2025022612)
Java: Azul Systems, Inc. 17.0.13

Transistor · April 15, 2025, 3:42pm

Your code line 2 says,
motorStatusTagPath = "[default]My_Tags/Motor_Status"
Your error indicates that line 2 is,
testTagPath = "[default]My_Tags/Motor_Status"
Which is it?

The error message indicates that you're missing an indent. This could mean that you've used a tab in some places and 4 × space characters in others.

neon93dx · April 15, 2025, 3:51pm

My code definitely says motorStatusTagPath

I've tried fixing the indents not mixing them with spaces but still won't run

Transistor · April 15, 2025, 3:57pm

Look for a second event on the button. I suspect that you'll find one with the testTagPath line in it.

neon93dx · April 15, 2025, 4:08pm

Ok that's removed (just added that to test the button) but the new error is:

com.inductiveautomation.ignition.common.script.JythonExecException
Traceback (most recent call last):
  File "<function:runAction>", line 19, in runAction
TypeError: unsupported operand type(s) for +: 'NoneType' and 'int'

	at org.python.core.Py.TypeError(Py.java:234)
	at org.python.core.PyObject._basic_add(PyObject.java:2091)
	at org.python.core.PyObject._add(PyObject.java:2068)
	at org.python.pycode._pyx7.runAction$1(<function:runAction>:19)
	at org.python.pycode._pyx7.call_function(<function:runAction>)
	at org.python.core.PyTableCode.call(PyTableCode.java:173)
	at org.python.core.PyBaseCode.call(PyBaseCode.java:306)
	at org.python.core.PyFunction.function___call__(PyFunction.java:474)
	at org.python.core.PyFunction.__call__(PyFunction.java:469)
	at org.python.core.PyFunction.__call__(PyFunction.java:464)
	at com.inductiveautomation.ignition.common.script.ScriptManager.runFunction(ScriptManager.java:847)
	at com.inductiveautomation.ignition.common.script.ScriptManager.runFunction(ScriptManager.java:829)
	at com.inductiveautomation.ignition.gateway.project.ProjectScriptLifecycle$TrackingProjectScriptManager.runFunction(ProjectScriptLifecycle.java:868)
	at com.inductiveautomation.ignition.common.script.ScriptManager$ScriptFunctionImpl.invoke(ScriptManager.java:1010)
	at com.inductiveautomation.ignition.gateway.project.ProjectScriptLifecycle$AutoRecompilingScriptFunction.invoke(ProjectScriptLifecycle.java:950)
	at com.inductiveautomation.perspective.gateway.script.ScriptFunctionHelper.invoke(ScriptFunctionHelper.java:161)
	at com.inductiveautomation.perspective.gateway.script.ScriptFunctionHelper.invoke(ScriptFunctionHelper.java:98)
	at com.inductiveautomation.perspective.gateway.action.ScriptAction.runAction(ScriptAction.java:80)
	at com.inductiveautomation.perspective.gateway.model.ActionCollection$ActionSequence$ExecuteActionsTask.lambda$call$0(ActionCollection.java:263)
	at com.inductiveautomation.perspective.gateway.api.LoggingContext.mdc(LoggingContext.java:54)
	at com.inductiveautomation.perspective.gateway.model.ActionCollection$ActionSequence$ExecuteActionsTask.call(ActionCollection.java:252)
	at com.inductiveautomation.perspective.gateway.model.ActionCollection$ActionSequence$ExecuteActionsTask.call(ActionCollection.java:221)
	at com.inductiveautomation.perspective.gateway.threading.BlockingTaskQueue$TaskWrapper.run(BlockingTaskQueue.java:154)
	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
	at java.base/java.util.concurrent.FutureTask.run(Unknown Source)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
	at com.inductiveautomation.perspective.gateway.threading.BlockingWork$BlockingWorkRunnable.run(BlockingWork.java:58)
	at java.base/java.lang.Thread.run(Unknown Source)
Caused by: org.python.core.PyException
Traceback (most recent call last):
  File "<function:runAction>", line 19, in runAction
TypeError: unsupported operand type(s) for +: 'NoneType' and 'int'

	... 29 more

Ignition v8.1.47 (b2025022612)
Java: Azul Systems, Inc. 17.0.13

Transistor · April 15, 2025, 4:11pm

You'll need to repost the current code (with the comment and indent corrected) and tell us which is line 19. (In the original post line 19 is a comment.)

neon93dx · April 15, 2025, 4:20pm

I've removed line 19 which was a comment but still same error

ryan.white · April 15, 2025, 4:24pm

Highly likely that your timestamp tag either is null or you are reading the wrong path.
system.tag.writeBlocking([runningTimeTagPath], [currentRunningTime + 1]) is likely the line that is causing the error but the true cause is that for some reason your currentRunningTime value is null instead of a number.

Post your modified code so we can confirm/review for other issues.

neon93dx · April 15, 2025, 6:03pm

Ok I changed the tag Motor_RunningTime from null to 0, now every time I press it increments, no error.