ISPF detects dialog service errors and displays a message identifying the error with the statement which caused the error. If a dialog service error occurs, the edit session ends abnormally with these results:

• When you are using the PDF component with ISPF test mode off, the ISPF Primary Option Menu is displayed.
• If you are using the PDF component with ISPF test mode on, you can override the abnormal end and attempt to continue by typing YES on the ISPF dialog error panel and pressing Enter. In either case, if ISPEXEC CONTROL ERRORS RETURN has been processed, no panel appears and the editor sends a return code instead of ending the dialog.