VMS Help DCE_IDL, ARGUMENTS, -trace  *Conan The Librarian (sorry for the slow response - running on an old VAX)

   -trace value

   Enables event logging.  You can specify one of the following values
   for the value argument:

   all       Log all events.

   none      Disable all previously specified trace options.

   calls     Log events relating to start and end of all RPC calls.

   context   Log events relating to context handle creation, deletion,
             and rundown.

   errors    Log errors.

   misc      Log all miscellaneous events.

   log_manager
             Enable command interface support which allows modification
             at runtime of event logging options.