When a user closes the Process Modeler in Firefox, other users are unable to edit the process model without breaking the original user's lock.
This issue has been reported to the Appian product team. The reference number for this issue is AN-80043.
Two workarounds are available to address this issue:
a) Use other supported browsers (IE11 or Chrome) when editing process models.
b) Release the lock by closing the tab as opposed to the entire window.
This article applies to all version of Appian.
Last Reviewed: May 2017