ISPD118 The initially invoked module ended with a return code = `aaaaaaaa`.

Explanation
 A program module was selected at ISPSTART time
that set a return code value other than 0 or 4.  These are the only
valid values.

Programmer response
 If you wish to set a return code for the program or procedure that invoked ISPSTART, consider
using the ZISPFRC variable to return this value. See z/OS ISPF Dialog Developer's Guide and Reference for details.