Hi tried Toad for Oracle 11.6 x32 (with x32 client) and x64 (with x64 client) .
toad 11.6 does not see tnsnames.ora.
The client is valid.
I also copied user_Files directory from Toad 11.0 and if I try to connect on a connection in the history I’m able to connect
With Toad 11.0 all works.
TNS_ADMIN variable is ok.
I have Win 7 x64.