BackupExec intermittently fails to set or clear backup mode of EV indices
Backup of EV 10.0.4 (using BackupExec 2012 SP4) fails intermittently while attempting to set or clear backup mode on EV indices. Event ID 41397 ("Some index volumes may not have the correct backup mode set. This can result in inconsistent backups.") is logged on EV server & backup mode can thereafter be set / cleared manually on EV server with no errors. Setting or clearing Backup Mode is always succesful on EV server using both admin console & powershell. But the problem keeps reappearing randomly when the BackupExec job is executing. BackupExec jobs do not fail consistently but 50-60% of the time, always with the same error ("cannot set or clear backup mode"). Workaround described in TECH209776 has already been attempted with no result.
Any ideas? Thank you very much in advance