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DECTPU, TPU$EXECUTE_COMMAND, Condition Values Returned

 *Conan The Librarian

    TPU$_SUCCESS       Normal successful completion.
    TPU$_EXECUTEFAIL   Execution aborted. This could be because of
                       execution errors or compilation errors.
    TPU$_EXITING       EXIT built-in procedure was invoked.
    TPU$_QUITTING      QUIT built-in procedure was invoked.
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