SAP HANA backup error 110026 using Netbackup

Hi all,

Would anyone know what causes the below error.

My backup script executes this backup command..

hdbsql -I 00 -n r3hana-s04 -u SYSTEM -p xxxxxxxx 'backup data using backint('''COMPLETE_DATA_BACKUP_20150922_08_57_27''')'

This is the error I receive...

447:backup could not be completed [110026] The state 'ManagerCommandRunning' of the BackupManager does not allow the requested operation

SQLSTATE: HY000 + RETURN_STATUS=191 + exit 191 SQLSTATE:HY000

I thought it might mean another process is running but I cannot find anything and have tried restarting HANA but still get the same error.

Thanks for any insights,

Craig