Title:'Admin user is Unable to cancel checkout of the QuarkXPress document that has been checkout by another user'
Error : 'XXX is editing the attribute for this file Try again later.

Affects: Quark Publishing Platform
All MAC & All Windows

Background: This issue occurs when the asset gets locked by a Platform Server process and a restart is required.
To avoid the QPP restart for cancelling the Checkout; Follow the steps below:

Solution:

• Login to the Admin
• Go to the User Activity tab
• Select the user who has checked-out the document and click 'Log off Users' (Note: Please notify the user first before performing this step that he/she will be logged off)
• Now try to do a cancel checkout of the asset.