I am trying to compress one of my geodatabase on SDE 10.4 but i keep getting this error below. My native client is version 11 and 64 bits and this error is just peculiar to 2 geodatabases out of the 7 geodatabases that I have on my server
ERROR 999999: Error executing function.
Failure to access the DBMS server [[Microsoft][SQL Server Native Client 11.0]Communication link failure] [sde.DEFAULT][STATE_ID = 15]
Underlying DBMS error [HY000:[Microsoft][SQL Server Native Client 11.0]Unspecified error occurred on SQL Server. Connection may have been terminated by the server.] [sde.DEFAULT]
Failed to execute (Compress).
gis servers, sde connection microsoft sql server 2012,
That doesn't really help much.
If possible, re-create the Spatial Index for the data in the Geodatabase and check if that helps.