Enable debug logging for bparchive, bpbackup, bplist, or bprestore (as appropriate) by creating debug log directories for them.

On UNIX, if a nonroot user has problems, verify that the directory that was created has mode 666. Look for and correct any reported errors.

Retry the operation and check the resulting logs.

If the logs do not reveal the problem, use the command-line version of the command and correct any problems that are reported on stderr.