"It is recommended that you cancel this upgrade. Your system has failed the compatibility check. The enforce server version (11.5.0.05030) is not compatible with this upgrade"
The upgrade log from the Enforce server shows:
com.vontu.update.ui.SystemCheckAction execute INFO: SystemCheckAction#execute Jun 7, 2012 4:40:11 PM com.vontu.update.ui.SystemCheckAction execute INFO: Checking the system for compatibility Jun 7, 2012 4:40:11 PM com.vontu.update.ui.SystemCheckAction execute SEVERE: Compatibility check failure: The Enforce server version (11.5.0.05030) is not compatible with this upgrade
When upgrading to 11.5.1 you should ensure you are using the correct upgrade jar file.
This issue occurred because the wrong upgrade jar file was used and since the upgrade jar was not newer than the existing version the compatibility check failed.
The file downloaded and used in this instance was called Symantec_DLP_11.5_MP1_Upgrader_Lin-IN.zip
The upgrade was successfully completed after downloading and upgrading with the jar file contained in Symantec_DLP_11.5.1_ReleaseUpdate_Lin-IN.zip
If you have any questions please call our Data Loss Prevention Techincal Support Team for assistance.