Error message: "Error opening PDF file" with new lyx-144-1.exe

[Marius Disler]

Thanks for the new version!

But I have some problems with the new LyX for Windows. I wanted to 
create a pdf with pdflatex and the result was an error window:

PDF viewer: "Error opening PDF file"

The other options ps2pdf, dvipdfm don't work either, but simple ps-files 
or DVI's are possible. I tried to convert pdf's from several .lyx-files, 
but even files with one letter don't work. Before I have used 
lyx-143-5.exe and it has worked fine. I use Windows XP.

Thanks for any help on this issue!