The connection is no longer usable because the server response for a previously executed statement was incorrectly formatted One of our application AX2013 is connecting to our DB's in an Availability group spanning three SQL2016 nodes.
End users are getting some error in the application that always point to the same error in the eventlog:
&quot;[Microsoft][SQL Server Native Client 11.0]The connection is no longer usable because the server response for a previously executed statement was incorrectly formatted.&quot;
The ax-team is looking at the DBA-team to fix this issue but we already changed the timeouts and don't see any other tasks we could do to resolve this issue.
Does anyone have any ideas?
Kind Regards
Based on the details you've provided, it's likely this error is being caused by a network issue between the AX server and the SQL Server.  If you have a network team, it might be good to bring them in to investigate if there are packets being lost between the two servers.
Another possibility is that there is an issue with the driver AX is using to connect to SQL Server (SQL Server Native Client 11.0).  Some possible options there are to

reinstall the driver,
update to the most recent supported version of the driver,
try a different driver, like MSOLEDBSQL (if that's configurable in AX, I don't know anything about that)