| Event Information | According to Microsoft
Cause: For certain replication operations, such as adding or dropping a column, the replication process must ensure that no snapshot process is performing work on the specified publication. This message indicates that the attempt to get an application lock via sp_getapplock on the specified publication for the exclusive operation failed because either a Snapshot Agent is working on the specified publication or another schema change is being performed from another connection. Resolution: Before executing the replication process, stop all Snapshot Agents for the specified publication. Verify that no one else is currently executing sp_repladdcolumn or sp_repldropcolumn for the specified publication.
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