EV10 Indexes fail to backup

Hi,

Looking at a customer's EV setup.

EV 10.0.0.1316

BE2010 R2 Win 2008 R2 installed on the EV server, SQL DB's also locally on the same server

EV incrementals during the week, full backup at the weekend, job uses the EV agent

Job fails with "Final error: 0xe0009502 - Backup Exec cannot place the Enterprise Vault vault stores or index locations into backup mode. Ensure that the selection is valid for a backup operation, and then try the job again."

And the detailed errors will show all the Index locations

The indexes are not in backup mode before the job starts, application log doesn't show any attempt to set the indexes into backup mode, but after the job fails, they are in backup mode?!

I've confirmed the Backup Exec account has the rights to set indexes and vaults into backup mode (vaults backup fine in the same job), BE credentials test also passes.

If I remove the Indexes selection from the job, it completes successfully

Server/services restarted, same fault found.

Prior to running test backups, I've restarted the index service, made sure no errors logged and nothing is set to backup mode, still fails the backup on the indexes.

Anything else I should be looking at?

Thanks