With Google I found: https://mail.encompasserve.org/anon/htnotes/note?f1=VMS&f2=2314.0 Erik On Mon, Jan 14, 2013 at 05:54:54PM +0000, lee.gleason at comcast.net wrote: I get: $ patch monitor.exe PATCH Version 5-05 20-June-1991 %PATCH-I-NOLCL, image does not contain local symbols %PATCH-I-NOGBL, some or all global symbols not accessible PATCH>exam 4158+33e 00004496: 00000000 Erik The addresses of the structures changed for each version or so of VMS...you'd need to locate them with the fiche, or reading a dump of the image, or , for older versions of VMS, just using the Google to find one for your version. I enclosed that one just as an example of what gets patched. Lessee....I also recall that MON ETHERNET required PHY_IO privilege, and needed a logical name NI$DEVICE set to be your network adapter's name to work. -- Lee K. Gleason N5ZMR Control-G Consultants lee.gleason at comcast.net