This is pretty wild, but I got OS 6 running using MinivMac, made a new HFS disk image with DMCS and my docs on it....AND IT WORKS!!!! Thanks for the tip about non-compatibility with OS9--that was the clue I needed to properly remember what the operating system was back then. Now for the excitement of trying to export something...

Hi Ron.  Would you be able to take a look at the creator and file type of the DMCS score files and report them here?  It would be much appreciated.