Hi~
I had programed one add-on apllication and used sd-set-model-checkpoint and sd-return-to-model-checkpoint functions to do return to the initial model state.When I to do that several time,the dialog pushing OK or CANCEL buttons did not to terminate the dialog and Modeling gave a Error message as below.

Could anybody tell me why?
Best regards
Justin
This thread is inactive and closed by the PTC Community Management Team. If you would like to provide a reply and re-open this thread, please notify the moderator and reference the thread. You may also use "Start a topic" button to ask a new question. Please be sure to include what version of the PTC product you are using so another community member knowledgeable about your version may be able to assist.