try
   if tcu.open(":alias:Atable") then
      if not tcu.edit() then
         tcu.close()
      endif
   else
      errorclear()
   endif

This should prevent the error showing. I'm not sure about edit. a full 
or exclusive lock on the table would do it but it would be rare unless 
you restructure tables in code all over the place. Locks are a 
completely different matter, of course and you need procedures in place 
to handle record locks and lock retrys when you use tcursors.

Peter wrote on 29/03/2019 8:16 AM:

> The problem with if/endif is that if open fails then Pdox err comes up 
> and I would rather it didn't so I switched to try/endTry


-- 
Tom Krieg
Contact me via the contact page at:
https://sdassociates.com.au