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

    /OUTPUT=output filename

    The name of the output filename.  This file will contain unanalyzed
    data.   While this file is being written, it can be read by another
    process.

    The  default  filename  is  TRACE.DAT  in  your   current   default
    directory.

    Not valid with /LIVE qualifier.