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Home > Success Center > Database Performance Analyzer (DPA) > dbghelp.dll version 4.0.5 messages in errorlog

dbghelp.dll version 4.0.5 messages in errorlog

Updated March 13, 2017


When monitoring an SQL server with DPA , the SQL server errorlog file gets bloated with messages like 'dbghelp.dll' version '4.0.5'.


  • DPA version 10.2 and later
  • monitoring SQL server 2012 Pre SP1 CU6
  • DPA deadlock feature is enabled


DPA 10.2 added a feature for deadlock logging. This item is not on by default and is using Extended events and then  the sys.fn_xe_file_target_read_file stored procedure to read the extended events. If DPA was configured to also use event_file as the target for extended events. 


Apply the Microsoft patch - FIX: "Using 'dbghelp.dll' version '4.0.5'" error is logged in SQL Server 2012 or SQL Server 2008 R2 when a statement or job executes the sys.fn_xe_file_target_read_file stored procedure on the monitored SQL server.

Or turn off DPA's extended events feature at the same time turning off DPA's deadlocks feature.

Go to options > Administration tab > Advanced options > Db instance options tab > support options check box checked in the upper right. > DEADLOCK_POLL_ENABLED.


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