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

    TPU$_SUCCESS       Normal successful completion. If the return
                       string contains a null-string, then the last
                       match of the search operations has occurred.
    TPU$_INCKWDCOM     The flags argument had an illegal combination
                       of values.
    TPU$_PARSEFAIL     The parse failed.