Upgrade problem

Hello,
Im trying to upgrade from 6.7 to 6.8.
But the upgrade fails, can anyone point in in a direction on where I can see more output on what can be wrong?
The file ppm.err only tells me "Some exception occurred during previous patch installation / uninstallation. Please contact support team."

See below.

/opt/PMP/bin# ./UpdateManager.sh -c -h /opt/PMP/

Press i to Install
      v to View installed ServicePack versions
      e to Exit
Choose an Option:i

Enter the patch file to install:/opt/ManageEngine_PasswordManager_Pro_6700_6701_6800_6801_to_6802.ppm

Error Occured...
Uninstalling   setCommonEnv.bat_pgsql                  [/]File ./Patch/ppm.err

Error occurred :: Irrevertable exception occurred.

Uninstallation Completed

Regards
fraggeln