VMS Help DECTPU, TPU$SPECIFY_ASYNC_ACTION, Condition Values Returned  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    TPU$_SUCCESS       Normal successful completion.
    TPU$_COMPILEFAIL   The code specified in tpu_statement did not
                       compile successfully.
    TPU$_INVPARM       An invalid parameter was passed.
    TPU$_JNLACTIVE     Keystroke journaling is active. This routine
                       requires that either journaling be turned off
                       or that buffer change journaling be used.