If a file is open by one user with OPEN "I" then another user can open it at 
the same time, but if the first user opens it with OPEN "R" then no other 
user can open it. 

Is there a way to tell if the file is open by another user on the network? 

I've tried FN isFileLocked and it doesn't report when the file is opened, and 
FN isFileBusy says it is busy even when it is open with OPEN "I". 

Bruce Moore