Hello, I have just upgraded to lyx 2.1 from lyx 2.07 (on Win 7 32 bit). I understand that there is a significant change with the way beamer is handled, and wanted to see what happens to my old presentations. The problem is that my previous beamer presentations, all made in lyx building on the old "20 minutes presentation" example file won't load. An attempt to load them leads to an error message - I attach a snippet. Other lyx documents (e.g., with the "article" class) work fine.
Sivan
