Sorry John,

I did not see your post.

You probably type to fast for me to follow ;)

The problem with NT is that giving R/W access to a file
also gives access to change its file attributes :(

We still haven't found the culprit but the other day
someone (or some process) changed the file attribute
of the main table of a system used by 50 peoples...

You can imagine the mess ;)

Pascal