Stats collector exception with Model parameter

[patrick_zweekhorst]

[ FlexSim 24.1.1 ]

Hi,

I have a stats collector that looks at a Model parameter at the change value for the event. The parameters are in the drop down option so I would expect it to work:

When pressing reset I get the following exception:

exception: FlexScript exception: Cannot access collected data values outside of statistics collector events at MODEL:/Tools/StatisticsCollectors/Content Vs Time_2 Collector>variables/eventReferences/Group1 - On Content Change/changeValue at line 4

Is this a bug? Or maybe just something that is not allowed?

As a work around we tried to set a label on the stats collector at the OnModelReset trigger and use this label in the stats collector instead of the model parameter. However this resulted in the same exception.

Thank you for your time,

Patrick

StatsCollector.fsm

[jason_lightfootVL7B4]

Have tried using the OnSet of the Parameter to set the value?

[patrick_zweekhorst]

Thank you for the idea Jason. However when I tried it I still get the exception.

[jason_lightfootVL7B4]

I can't see an issue.

statscollector_jl.fsm

[patrick_zweekhorst]

Hi Jason,

Now that I see your model I noticed that I mis understood your suggestion. I thought the idea was to set a label on the stats collector from the OnSet of the Model parameter. Setting the value of the node itself indeed works.
Thanks!

Would you still classify the original error as a bug, or just something that is not allowed?

[jason_lightfootVL7B4]

@Jordan Johnson may have a view on this - the problem could be due to the parameter value being stored on a sdt node and perhaps listeners are not easily applied to them - but I'm guessing.

[JordanLJohnson · Accepted solution]

This is a bug, but it seems you can work around it. The issue is the header that is applied when you add code directly. Change the code to this:

StatisticsCollector collector = ownerobject(c);
// var data = collector.collectedData;
// treenode current = data.eventNode;
// Object instance = data.processFlowInstance;

return /**/Model.parameters.Parameter1/**direct*/;

I'll add it to the dev list. It is true that collectedData is not yet available, because the event hasn't actually fired yet. This code is testing whether the event should fire. The bug (at least in my opinion) is that the header adds invalid stuff like that.