Library /sys$common/syshlp/tracehlp.hlb ATTACH, /PARENT  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    /PARENT

    This is only valid if issued from a sub-process.  It specifies that
    you want to attach to your parent process.

    If  you  specify  /PARENT  you  cannot  specify   process-name   or
    /IDENTIFICATION.