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QuickBooks Desktop Sync Error: Another Active Sync already in Progress or Another active Session in progress

Error

Another Active Sync already in Progress or Another active Session in progress

Explanation

This error message "Another Active Sync already in Progress/Another active Session in progress" is a safeguard to prevent multiple syncs against same QuickBooks file at same time which can cause bad data. 

Solutions

  • This error message has a timeout set at 20 minutes, so please wait at least 20 minutes before attempting to sync again.
  • If you are using a Right Networks Server - shutting down and restarting the server should also fix the problem.