Thank you very much for your response! Btw: I am using 2010. That’s almost what I want, I learned that I can use some more fields than I had known (such as custom task fields). However, I would like to store the version in a custom file property field (which can be created selecting File – Info – Project Information – Advanced Properties – Custom). I guess If I wanted to use a task field I would have to store the value in the respective field of Task 0, right (e.g. Text1 of the project summary task).