/DEBUG[=(option[,...])]
  /NODEBUG

  Controls whether the compiler produces traceback and local symbol
  table information for the VMS Debugger.  The /DEBUG qualifier
  allows you to refer to data items by data name, and to Procedure
  Division locations by line number, paragraph name, and section
  name.  You can also view source lines from source files and
  files included by simple COPY statements.  The debugger cannot
  reference source lines from CDD/Repository or any line in which text
  has been replaced.  If you specify a qualifier option, the
  default options do not change unless they are individually
  modified.

  You can select one or more of the following options:

  [NO]SYMBOLS     Produces a local symbol table that allows you to
                  refer to data items by data name and to source
                  lines by line number.  The default is NOSYMBOLS.

  [NO]TRACEBACK   Produces traceback information only to provide
                  the debugger with compiler-generated line
                  numbers and names.  The default is TRACEBACK.

  ALL             Provides traceback and local symbol table
                  information.  /DEBUG=ALL is the equivalent of
                  /DEBUG or /DEBUG=(TRACEBACK,SYMBOLS).

  NONE            Omits traceback and local symbol table information.
                  /DEBUG=NONE is the equivalent of /NODEBUG.

  The default is /DEBUG=TRACEBACK.