We imported an Mx4 module into an Mx5.21 project. We resolved all the errors and could run the project. Now the strange part. Every time we start the project we encounter new errors all in the XML to domain mapping all in decimal to float conversions. When you right click on all the errors you can let the model fix them automaticly. Then again you have zero errors. You can now run the project again, but the next time you open the project again you get again multiple errors on different xml to domain objects. I think there goes something wrong with checking all the XML to domain mappings for fixing of decimal to float errors. Regards, Ronald