Ok so I'm having this problem when exporting the tutorial map I made (using the tutorial that came with the HEK editing kit) with JMS Model exporter:

--Unknown property: "name" in undefined

So what does this mean?
I have done everything exactly as in the tutorial, but I cant seem to find what causes this problem. But when I try to export the already made tutorial map (came with the editing kit), it exports with no problems. And to me these 2 maps look exactly the same...

Ive had this error before. It seems like you have a piece of mesh that does not have a material applied to it. For example, your multi sub object material list goes up to 8 materials and you have a piece of mesh that is ID 9

go into editable mesh/poly, unhide all and select faces by material ID, keep hiding them, after all materials you know of are hidden, then try selecting any remaining faces, apply material to them.
Edited by Flash44x on May 2, 2014 at 01:51 PM

YES!! that fixed it (had set the player_clip thingys surrounding the level to material id 2 even though there is only material id 1 for player_clip) :D thx for help!