Hello! It turned out that I was just not patient enough. The migration succeeded in the end. In the next step I wanted to build the migrated morphology with the latest 'morph'. There I ran into strange exceptions/bachtraces. Tinkering a bit with the Python code it turned out that VERSION and DEFAULTS were searched in some odd tmp-directory. After I replaced the corresponding variable with 'os.getcwd()' in some places it worked. But I assume that there should be a 'correct' way to get the build running? Regards, Christoph