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Attempted to make calls on more than one thread in single threaded mode

Question asked by ngajula on Jan 3, 2016

One single list item is opened in edit mode by two different users. The edit form is designed using Nintex form. When the two users tries to save the form simultaneously at same time a SharePoint error message is displayed for one of the users. The error message displayed states that “Save Conflict Your changes conflict with those made concurrently by another user. If you want your changes to be applied, click on back in your web browser, refresh the page, and resubmit the form”.

When we have moved the same Nintex form in a separate environment and performed the same steps mentioned above one of the user is getting a different error message. The error message states “Attempted to make calls on more than one thread in single threaded mode. ((Exception from HRESULT: 0x80010102) (RPC_E_ATTEMPTED_MULTITHREAD))”.

Note: No customization is done to handle save concurrency issue.

Can anyone please tell why two different error getting displayed for the same steps?

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