Symptom
When running the SAP Business One upgrade wizard, you receive the following error message in the "Pre-Upgrade Check Result" window:"Upgrade not possible; company upgrade status is invalid".
Cause
Consulting
Solution
Make sure that you are upgrading the backup of the original database but not a database that has already gone through an upgrade process.
If you are upgrading the original database, but still receive this error message, create a message under the component "SBO-BC-UPG" and ask for support from SAP. Attach to the message the link to the upgrade log file.
Find the upgrade log file in the default log folder at "%USERPROFILE%\Local Settings\Application Data\SAP\SAP Business One\Log\UpgradeWizard", or from other folders that have been configured in "B1_Install_Folder\Conf\b1-config-path.txt".