SET(TRACEBACK)

     Determines whether DECTPU includes the procedure calling sequence when
     an error message is displayed.

  Syntax

     SET (TRACEBACK, {ON | OFF}

  Parameters

     ON                   Causes DECTPU to include the procedure calling
                          sequence preceding the error when an error message
                          is displayed.  If no section file was loaded when
                          DECTPU was invoked, the default setting is ON.

     OFF                  Suppresses the display of the procedure calling
                          sequence in error messages.  If a section file was
                          loaded when DECTPU was invoked, the default
                          setting is OFF.