Cleanup
process may fail to delete out of retention backups with the following error:
cleanup_function
UnboundLocalError: local variable 'res' referenced before assignment
Reference
defect number - 9c7d715343, fixed in v2.1.3a
Link
to the Release Notes and the latest patch - https://support.n2ws.com/portal/kb/articles/release-notes-for-the-latest-v2-1-x-cpm-patch