"Purchase Order Being Edited by Another User" in Microsoft Dynamics GP

Do you have access to customersource?  If you do there is an "Automated Solution fix, under Dynamics GP, find  "Clear PO Users"

 

To resolve this problem yourself, follow these steps:

1. Have all users exit Microsoft Dynamics GP.
2. Back up Microsoft Dynamics GP, and then back up all the Microsoft Dynamics GP databases.
3. Start SQL Query Analyzer, and then run the following command against the DYNAMICS database.
   
   

   DELETE SY00800
   DELETE SY00801
   DELETE ACTIVITY

   
   
4. Start SQL Query Analyzer, and then run the following command against the tempdb database.
   
   

   DELETE DEX_LOCK
   DELETE DEX_SESSION

   
   
5. Start Microsoft Dynamics GP, and then select the purchase order.

NOTE:  Please remove POP related activity/records from above mentioned tables.