Because IEModelViewControl::Save starts a new thread of execution and because eDrawings files are often saved across the internet or other potentially slow and unreliable networks, this call can return before the document is finished saving.

Referencing a model that has not finished saving can cause your application to hang, crash, or behave unpredictably. Therefore, listen for the IEModelViewControl::OnFinishedSavingDocument event after calling IEModelViewControl::Save so that your application knows when the eDrawings file is finished saving. Once your application receives notification that the eDrawings file has been saved, it is safe to exit your application or load another file in the same function.