Liviu
> That's odd. The first question that pops to mind: Do you use the > Document > Compressed option? Maybe this corrupts things. > What is also odd is that I can open the file with no problem using a text editor on the Mac, indeed the file preview in the Mac file Manager (Pathfinder) reads it without any problems. BUT I have just tried on Ubuntu (open with text editor) , and it won't open. I certainly haven't selected the compressed option, but this particular file is 7 months old, and I can't remember whether it originated on the Mac or Ubuntu or even the version of Lyx. I will check the compressed option in future. However, it seems there is no obvious answer, so I will just be more cautious in future. Thanks, Graham