Adding a subset to a Zone in FlexSim 17.1 beta does not work properly

[jon_abbott]

[ FlexSim 17.1.0 ]

Adding a subset to a Zone in FlexSim 17.1.0 beta does not appear to work properly. Steps to reproduce the issue are:

1. Create a new model
2. Create a process flow
3. Drag a Zone item into the process flow
4. Click on the zone's symbol to open its properties
5. Click "More Properties"
6. Click the green "+" in the Subsets tab

At this point, the following error is reported in the System Console:

exception: FlexScript exception: Invalid down cast. Object is not an instance of the target type. at VIEW:/active/ZoneProperties470956416/tabcontrol/Subsets/SubsetsPanel>eventfunctions/panelFromItem c: VIEW:/active/ZoneProperties470956416/tabcontrol/Subsets/SubsetsPanel