Lyx: LATEX error "Cannot determine size of graphic in ..."

"Package graphics Error: Division by 0. Arithmetic overflow. LATEX error "Cannot determine size of graphic in ..." Dear Ladies and Gentlemen, 1.) I get the same this message, when trying to export pdf (pdflatex) . Please, maybe You can help me? 2.) I have the pictures for my L

Question

Dear Ladies & Gentlemen of Lyx, Maybe You can help me, whenever I insert a graph into the text, either with ending jpeg, bmp or any else and then try to View DVI, then I get this error-message window: Die Datei kann nicht konvertiert werden Fehler beim Ausführen von pyth