Are you running a native mobile app in the Make it Native app? If so, flip the “Clear Data” switch before loading your app.
I dont know if you have tried it already or if it helps but have you tried cleaning your deployment directory?
Look at any code part that has been copied or reused from your previous project. Widgets, shared modules, etc. If that fails, do a general lookup to [Name], both in the Mendix Studio and in Eclipse.