WOW!!!

You are the best!!

Thank you very very much!!!!

I'm affraid that is my problem.

I don't know what is the exact correspondance between DSN parameters and linked server parameters.

I tried (I think) all combinations, and the linked server is...

Thaks for your reply!

So, I must install Informix Client SDK in my SQL Server?

My Local DNS works perfectly with Access, and I have not installed Informix Client SDK !!

Merry Christmas to all the SQL Server Central Team!!

Congratulations for your impressive work!!