These are other things I've found:

a) The PATH_EDGE lists node1 and node2 as long, but they are float.
b) You need to save at least 20 edges, having less causes the engine to crash (haven't tested with more than 20).
c) For entities I had to set the length of ACTION array to 34 instead of 33, this way I can read the skills and flags without problem.

EDIT: d) In the PATH_EDGE the node numbers start with 1 not 0

Regards