Unable to process. Duplication session in progress. return value = [134]

From time to time the the nbstlutil command may return the message:

Unable to process. Duplication session in progress. return value = [134]

When activating or inactivating Storage Lifecycle Policies (slp). Since the nbstlutil command always return status code 0 this is quite a problem if the command is part of a script. However specifying the -wait argument causes nbstlutil command to retry the command until duplication session is no longer in progress.

Please note the -wait argument is picky about where it’s specified.

This command will retry/wait

# nbstlutil -wait inactive -lifecycle {slp_name}

But this doesn’t

# nbstlutil inactive -lifecycle {slp_name} -wait