The company file you have selected is Version x. Plus requires Version y files...
Troubleshooting Alert Messages Overview > Alert messages (in alphabetical order) > The company file you have selected...If you haven't already done so, we suggest you read the Troubleshooting Alert Messages Overview.
Situation: The company file you attempted to open is from an older version of MYOB Plus, and can't be used by the version of MYOB Plus on your workstation.
Solution: Be sure the company file you attempted to open is the company file you want. If you're sure the file is correct, you'll need to upgrade the company file using the MYOB Plus Upgrade Assistant.
The company file you have selected is Version x. MYOB Plus requires Version y files...