These return codes are possible:
- 0
- Normal completion.
For the COMMAND option, the ret-buffer-name is
set to blanks and the ret-length-name is
set to zero. Passing an empty command chain buffer also results in
a normal completion.
- 4
- One or more commands in the stack could not be found in the active
set of command tables.
- 8
- User requested termination using the END or RETURN command. If
CANCEL and EXIT are requested from a panel displayed using the DISPLAY
service call and the panel was defined with the dialog tag language
(DTL), the dialog manager returns the command in ZVERB and sets a
return code of 8 from the display screen.
- 12
- The specified panel, message, message location field, or cursor
field could not be found.
- 16
- Truncation or translation error in storing defined variables.
- 20
- Severe error.