.gif and .png: coincidence

I'm taking a look at JEDI-SDL (which does make GUIs and games a whole lad easier) but I have one mega problem here.

My program DOES NOT use any .png images and only uses .gif images

I was wondering why i get a runtime error 216 (which i managed to fix with a few hours of time) to get this output:

libpng error out of memory

BUT IM NOT USING ANY PNGs so why is it happening?
any help would be very appreciated.