First time, however, something really confused me. Pro/E (2001)exited every time I tried to save anything after having used the batch mode.
After nearly two days of testing and consulting the support I found a new prodev.dat file in my working directory, removing that one solved it all.....
Ptc says its a "customization issue", strange to me since the file was created by the system itself.
Maybe this can save some effort if it occurs for someone else