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Hello,

thx for the info. It got us further but there is still problem with it. Can you please help?

 

We created PRE and POST events (CheckinFileEvents_Pre , CheckinFileEvents_Post) according the code.
The OnLoad function is supposed to register event handler, and it is called from Activate function of the add-in.
HOwever, when pushing Check-in button, no PRE or POST actions are performed.
When debugging, the following error message can be seen during registration of the event handler: "The runtime is unable to evaluate this expression", see the picture:

InventorCheckINAPIProblem.png