Error codes that ISPF can return in register 15 to an application are:

908

ZISPFRC value not valid.

920

ISPSTART command syntax not valid.

930

ISPSTART Program not found.

940

ISPSTART Command not found.

950

An ISPF session running on behalf of a z/OS® client had to be abnormally terminated.

985

An attempt was made to start a GUI in batch mode, but no workstation connection was made.

987

An attempt was made to start GUI with GUISCRW or GUISCRD and the GUI initialization failed.

988

An error occurred initializing IKJSATTN.

989

The ISPF C/S component window was closed while still running ISPF in GUI mode.

990

An error occurred running in batch mode. If ZISPFRC has not been set previously, and ISPF encounters a severe error that terminates the product, then 990 is set.

997

Uncorrectable TPUT error.

998

ISPF initialization error. A 998 error code can result from:

• Required ISPF data element library not preallocated
• Error opening ISPF data element library
• ISPF data element library has invalid data set characteristics
• Error loading literals module
• Recursive ISPF call

ISPF issues a line message that indicates which of these errors caused the 998 return code.

999

ISPF environment not valid. A 999 error code can result from:

• TSO/MVS environment not valid
• Unsupported screen size

ISPF issues a line message that indicates which of these errors caused the 999 return code.

When running in batch, ISPF can also return the following return codes:

9008

Abend termination.

9012

Attach error.

9014

Authorized command invocation error, or TSO CMD START exit routine rejected the command.

9016

Command not found, or was otherwise unable to execute, or an exit routine returned an invalid return code.

9018

Invalid command: LOGOFF, ISPF, etc.

9020

TSO RTN IKJTBLS (called from CAU) abended.