Hello everyone,
FlexSim gave me this exception:
FlexScript exception: Property "value" accessed on invalid node. at VIEW:/active/MainPanel/BackPanel/SplitterXPane/ToolTabPane~2/TabControl/QuickProperties/ToolPanel/ActivityProperties/Activity Properties/ActivityPropsTemplate~5>eventfunctions/showPanel
I tried to restart the Default Workspace, but it did not work for me.
One of the consequences of this exception is that I couldn't edit an activity (not in its icon or in Quick Properties).
When I close the Quick Properties the exception stopped appering, however I could not edit the properties of the bugged activity.
The solution I found is to split the set of activities (A,B,C,D,E) into (A,B,C) -> (D,E) (assuming D is the wrong activity). That worked for me.