Upgrading problem

[BjornW]

I've been using PlSqlDev ver 4.0.1 since a couple of years and it has worked fine, but when I upgrade to version 5 or 6 I have this problem.
Installation goes fine
Logon to database goes ok and I can see all database objects to the left
but When I try to access db (select * from ...) the software goes "Initilizing ..." for 15-20 sec and then I got "ORA-12154: TNS:could not resolve service name"
If I then reinstall version 4 everything works fine
I'm very thankful for any clues

Bjorn

 

[Marco Kalter]

Maybe this is an environment problem. Can you go to Help > About, press the 'Info' button, press the 'Copy all pages' button on this info screen, and paste this text into an e-mail reply?