Gerard,
What you found was a Problem documented for DB 11.0. (I guess we have good archives!).
Seems unlikely that your definition of the table or your applications have changed in the context of upgrading to 15.1. Maybe you were previously suppressing the 13(14) dumps with the RCERROR function and now are not. If that's the case and your apps get them routinely, consider suppressing them again.
If that isn't helpful, please open a case with CA Support.
Dale Russell
Director, Software Engineering