/DEBUG[=(option[,...])] D=/DEBUG=TRACEBACK

 /NODEBUG

 Controls whether the compiler generates information for  use  by
 the  VMS  Debugger  and  the run-time error traceback mechanism.
 The available options are:

    ALL                 
      Specifies that the compiler should include symbol and traceback
      information in the object module.

    NONE                
      Symbol and traceback information will not be included in the
      object module.

    [NO]SYMBOLS         
      Specifies that the compiler should include in the object module
      symbol definitions for all identifiers in the compilation.

    [NO]TRACEBACK       
      Specifies that the compiler should include in the object module
      traceback information permitting virtual addresses to be
      translated into source program routine names and compiler-
      generated line numbers.

 When  you  specify  SYMBOLS  without  TRACEBACK,  the  table  of
 compiler-generated  line  numbers  is  omitted from the debugger
 symbol file.

 You should consider using /NOOPTIMIZE when you are using /DEBUG.
 Allowing  optimizations  to occur might make debugging difficult
 and might obsucre some sections of the compilation unit that you
 want to debug.

 /DEBUG=TRACEBACK is enabled by default.   The  /DEBUG  qualifier
 without  options  is  equivalent  to  /DEBUG=ALL.   The /NODEBUG
 qualifier is equivalent to /DEBUG=NONE.