what I might attempt is: 1. Change the version number, at the top of the file, to 4.0. yes, I know you mentioned using P5. 2. Delete the movieInfo block, watch you braces. 3. Delete all lights. Save under new name and see if it will open. Sometimes the lights can give fits. If it still won't open then I would try deleting all texture references...textureMap Save and try. If you have clothing, hair those would be the next on my list to delete.

I must remember to remember what it was I had to remember.