Hmm it doesnt seem to be finding the location.
It continues to say "unable to access jarfile...." However it seems to be shortening the location in the error (could that be an issue?)
when i type in java -jar C

Users\FIRST LAST\Desktop\NW2PNG.jar
it returns "unable to access jarfile c

users\FIRST"
Im opening up the properties of nw2png.jar and copying the location exactly (and then adding \NW2PNG.jar to the end), so i don't think my location is an issue?