Calling the TPU$EXECUTE_INIFILE routine causes DECTPU to perform
    the following steps:

    1. The command file is read into a buffer. The default is
       TPU$COMMAND.TPU. If you specified a file on the command line
       that cannot be found, an error message is displayed and the
       routine is aborted.

    2. If you specified the /DEBUG qualifier on the command
       line, the DEBUG file is read into a buffer. The default is
       SYS$SHARE:TPU$DEBUG.TPU.

    3. The DEBUG file is compiled and executed (if available).

    4. TPU$INIT_PROCEDURE is executed (if available).

    5. The Command buffer is compiled and executed (if available).

    6. TPU$INIT_POSTPROCEDURE is executed (if available).

                                   NOTE

       If you call this routine after calling TPU$CLEANUP, you must
       set the flags TPU$_EXECUTEPROCEDURE and TPU$_EXECUTEFILE.
       Otherwise, the initialization file does not execute.