Hi, i've a problem with Lyx converters. Yesterday everything works, but today something goes wrong. I use Lyx 1.4.4 on an iBook G4, with Mac OS X 10.4.9, and when I try to view a lyx file as PDF(PS 2 PDF) i obtain:

No information for converting gif format file to png.
Define a convertor in the preferences.

No information for converting pdf format files to png.
Define a convertor in the preferences.

same thing with pdflatex, but there's not error on gif, only problem with PNG:

No information for converting png fotmat files to eps.
Define a convertor in the preferences

I miss something? Yesterday everything works....

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