[jboss-jira] [JBoss JIRA] (DROOLS-5230) Managing a List of structures in Test Scenario editor produces an Exception

[Tracy Hires (Jira)]

Tracy Hires created DROOLS-5230:
-----------------------------------

             Summary: Managing a List of structures in Test Scenario editor produces an Exception
                 Key: DROOLS-5230
                 URL: https://issues.redhat.com/browse/DROOLS-5230
             Project: Drools
          Issue Type: Bug
            Reporter: Tracy Hires
            Assignee: Mario Fusco
         Attachments: Error screen shot.png, test_scenario_list_exception.zip

When trying to delete an item from a list of structures with nested structures in the scenario editor, an exception is thrown with a message that is not helpful to the end user.

Log entry is:
```
^[[0m^[[31m17:16:51,564 ERROR [org.kie.workbench.common.services.backend.logger.GenericErrorLoggerServiceImpl] (default task-415) Error from user: xxxxx Error ID: -881202734 Location: LibraryPerspective|$ProjectScreen[!Worg.kie.dmn.decision.navigator,EDiagramEditorPropertiesScreen,Eorg.drools.scenariosimulation.TestTools?scesimeditorid=1,!Eorg.drools.scenariosimulation.TestTools?scesimeditorid=2,Eorg.docks.PlaceHolder?name=testRunnerReportingPanel,Worg.kie.guvnor.explorer,],DMNDiagramEditor?path_uri=default://master@dm-ai/XmlValidationBug/src/main/resources/Math%2520Functions.dmn&file_name=Math%20Functions.dmn&has_version_support=true,DMNDiagramEditor?path_uri=default://master@dm-ai/XmlValidationBug/src/main/resources/Divide.dmn&file_name=Divide.dmn&has_version_support=true,org.kie.workbench.common.screens.messageconsole.MessageConsole,,AddAssetsScreen,ScenarioSimulationEditor?path_uri=default://master@dm-ai/XmlValidationBug/src/test/resources/Test%2520Math%2520Functions.scesim&file_name=Test%20Math%20Functions.scesim&has_version_support=true Exception: Uncaught exception: Exception caught: (TypeError) : Cannot read property 'Tc' of undefined Caused by: (TypeError) : Cannot read property 'Tc' of undefined
```

>From UI I could see: `Uncaught exception: Exception caught: (TypeError) : Cannot read property 'Tc' of undefined Caused by: (TypeError) : Cannot read property 'Tc' of undefined`

(Screenshot is attached)




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