CA DADS Plus for CICS uses SVC 99 to allocate datasets.
The E=X'9700' error messages codes can be in the MVS Programming: Authorized Assembler Services Guide
at the link below.
See Chapter 25. Dynamic allocation
This edition applies to Version 2 Release 3 of z/OS (5650-ZOS) and to all subsequent releases and modifications until otherwise indicated in new editions. Last updated: May 29, 2018
Meaning: Severe storage management subsystem (SMS) IDAX, ACS and Construct Access Services error.
Application programmer action: Check field S99ERSN for a non-zero value. A non-zero value in S99ERSN is a reason code. See “SMS reason code (S99ERSN)” on page 569 for the possible reason codes. If the system displayed message IKJ56893I, SMS messages for the error follow IKJ56893I. If the system displayed message IKJ56894I, no messages were returned. Request the message processing option of dynamic allocation to obtain related messages and resubmit the request. If you still cannot obtain messages, contact your system programmer for assistance.
Corresponding Messages: IKJ56893I (messages were displayed) or IKJ56894I (messages not displayed).
This was not a CA DADS plus problem. CICS was experiencing system problems. Once the CICS region was recycled the problem cleared up.