Hello,
There is this global file setting....
# PostExecOnAbortHostBackup=0 or 1
# default: 0
# If this option is set (=1), Backup Session Manager (BSM) will
# execute post-exec specified for host objects even if session
# is aborting.
# If this option is not set (=0), Backup Session Manager (BSM)
# will not execute post-exec specified for host objects
# if session is aborting.
It look like PostExecOnAbortHostBackup=1 may do what you want
Regards, Stewart