Situation
The company file you attempted to open can't be used by the U.S. version of MYOB AccountEdge.
Solution
Be sure the company file you attempted to open is an MYOB AccountEdge 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 AccountEdge that is customized for the country mentioned in the message.