Error handling

Fast data access does not provide error handling routines for logic failures caused by input or environmental problems. It does use error returns from system services where those are reasonably available, and reflects such errors in the reason codes it returns.

In a few cases fast data writes diagnostic messages to the job log (JESYSMG). These have IEW2nnn message numbers, and are documented in the appropriate volume of z/OS® MVS™ System Messages.

If a problem needs to be reported to IBM®, the following will be helpful:

For an ABEND or program check in fast data, a SLIP dump or SYSMDUMP which includes 64-bit storage.
For an unexpected return and reason code, a trace which can be gotten by allocating an IEWTRACE DD statement. fast data uses QSAM to write variable blocked records to the data set or SYSOUT destination specified.