BRMS in a CL redeaux

About 1 year ago I posted this question but have not gotten a resolution as
of yet. Here it goes again: I have a BRMS question for those familiar. We
currently have a CL that does our nightly processing and backups. We
replaced the SAVLIB command in it with STRBKUBRM. The CL already runs in
batch and the STRBKUBRM cmd is entered as SBMJOB(*no) so it will continue
in the same CL. The problem is this: We need to monitor messages for the
STRBKUBRM so that, if there is no valid BRMS tape loaded or a scratch tape
is not loaded, the CL will continue and complete the rest of the steps it
needs to complete. What happens now is that we get a CPA4086 error(Device
not ready or next volume was not loaded). We've tried monitoring for BRMS
messages with a MONMSG BRM0000 and we've tried monitoring for CPA0000 but
that does not work. We do not want to replace the CL with a BRMS control
group that has multiple *EXITs because it can be run with different
parameters. And here's the kicker....CHKTAP won't work when checking for a
valid BRMS tape (as far as I've seen). What MONMSGs are needed or how else
can we make this work? Thanks.

 NF