Documentation for the Netdata format is in the comments for the DMSDDL modules that produce it. I haven't been able to find anything else ANYWHERE about it. I f anyone's interested, I can summarize the info in my own words (thus avoiding copyright problems with IBM code -- I hope) and tell the rest of you what's goi ng on. P.S. -- We have some *nice* Waterloo C routines that can read and write the pro per Netdata headers. Anybody want 'em? David Boyes Systems University of Oregon Computing Center