Applications that access DEDBs

If your application accesses data entry databases (DEDBs) with IMS 13 or earlier, the following requirement applies.

To obtain the correct length of the DEDB compressed segment or the DEDB fixed-length segment, add a BTSACB DD statement to the JCL or the ALLOC statement in the CLIST. BTSACB DD statement specifies ACBLIB including the member with compressed segment or fixed-length segment. If you do not specify a BTSACB DD statement in the JCL or the ALLOC statement in the CLIST, the length after compression or the length "fixed-length + 2 bytes" is put on the BTSOUT or the TSO screen when the application program issues a DEDB ISRT call.