LaTeX.org

This is going to sound stupid, but because of desperation I just tried to compile the .tex despite the errors, pushing Enter every time the black-background window stopped to tell me something. LaTeX, then PDFLaTeX. And I got my .pdf file in the end, and all the images are there. Am I supposed to do ...

Here is the .log file. Theres probably more stuff than this error because Im trying to compile two years old .tex (which compiled fine on my previous LaTeX; no I dont know the version.)

This is pdfTeX, Version 3.14159265-2.6-1.40.17 (MiKTeX 2.9) (preloaded format=pdflatex 2016.7.24) 30 JUL 2016 17 ...

Hello, I looked around and checked other topics of similar problem but didn't come up with solution. I have MikTeX 2.9 and am writing in WinEdt 5.3. When trying to compile LaTeX I get error

! LaTeX Error: File 'catalog' not found.

See the LaTeX manual or LaTeX Companion for explanation.
Type H ...