The -1073741819 reported by the ANS1512E message could have been
better programmed for such high negative values, to more appropriately
and helpfully report it as C0000005, which is more readily findable as
a memory access problem.  Your posting doesn't cite your software
levels: this might be APAR IC49467.  Look for event log, dsierror.log,
and dsmcrash.log problem indications, and take a look at the Exchange
side log if necessary.

You might also see if the backup can be invoked manually: If the same
problem occurs, you can trace it thereby.

    Richard Sims