triangulation failed

Took me a while... :)

There is a double path segment in the marked area. Remove the duplicate and the shape will be folded up fine.

We need to add more analysing tools to Origami...

thx Vitaly,

and yes! more analising tools would be very helpful! it takes too long somtimes to determine what is wrong.

this script should help you remove duplicate lines

http://illustrator.hilfdirselbst.ch/dokuwiki/en/skripte/javascript/wr-removeduplicates