Situation
The company file you attempted to open can't be used by the U.S. version of MYOB Premier Accounting.
Solution
Be sure the company file you attempted to open is an MYOB Premier Accounting company file, and that it's the company file you want to open. If you're sure the file is correct, you'll need to obtain a version of MYOB Premier Accounting that is customized for the country mentioned in the message.