These error messages are prefaced by CIA070xx. You can dump the error log to determine the failed program name, transaction, and any Link3270 bridge header and vector data among other pertinent information. Use this information to assist in problem diagnosis.
Reference the CICS Application Programming Reference for CICS® response codes and definitions and the CICS External Interfaces Guide for CICS Version 2 Release 2, for Link3270 bridge header structure (BRIH) and inbound/outbound vector message structure (BRIV) definitions, return and completion codes.