Merging projects - can you have different project codes and different calendars? My guess is that you have to have the same project codes with the same lengths or you have to make them match before every clean up. My guess is that it is better to have different calendars because you cannot force two different contractors to use the same. If they are both name 5 week calendar will P6 add the project name? or do you have to before import? Would a resource field have to be the same length or name? or cost?