Toad oracle version 17 fails to connect

fails with error "could not resolve connect string".
however tnsping successfully, sqlplus is successfully, and other oracle tools also successfully.
we use tnsnames.ora to connect.

That should work fine if things are set up correctly.

We cannot diagnose your problem when you provide so little information.

What is your Toad version?
Please provide some screen shots so we can better understand what led to the error.
Do you have more than one Oracle client installed?
If so, are Toad and SQL Plus using the same client?
If so, do you have a TNS_ADMIN environment variable defined?
Does it work if you configure Toad to not use an Oracle client?

hello !
your questions helped me.
there was a "Oracle-Client-for-Microsoft-Tools" also installed on machine.
I have de-installed it and now it works well
thank you very much !
Meir

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