[Catherinev]

Hi,
Indeed the General error 48 in my case was also due to a .swf file that final cut pro could no longer read. This happened after I updated my applications and I think quicktime was in the updates.
After my updates, Final cut pro had no problem reading the .swf files that I had already placed in the time line, (before the updates), as long as I did not try to change any part of the time line with the files. When I did try to do somehting with the .swf files, the general error 48 would appear and my timeline was gone for good.
As Ben Holmes said in his post, the best thing is to look in your autosave vault to find the last one that doesn’t give a general error when opening it and then erase the .swf files. If you’re lucky close the project without saving it as soon as you have the general error sign, when you reopen your project you should be able to read your time line normally, and you can get rid of the swf files.
Hope this helps!
Catherine