cant save jms file!!

[gecko753]

ive been working on this map for a long time, and so far all the jms stuff has been working fine. but i just copied a base to another place and attatched it then tried to export as a jms. but then i get this error:

An error has occurred and the application will now close.
No scene changes have occurred since your last save.

and i have no clue why it does this now. im gonna go take out that base i added and see if that was the problem.. anyone have some idea as to what might cause this?

[ThabounceR]

i have that sometimes,

try selectinf all faces, in facemode, then click on uvwmap, link level to frame, deselect all, then try export again

or just do what is explainded in the "tutorial"

this is usually related to some strange geometry construction error or illegal material assignment.

Try the following steps below to track down the error.

1) Systematically unlink objects from the reference frame and try to export until the level exports successfully. This can help determine which object and related geometry are causing export problems.

2) If an object has a Multi/Sub-Object applied to it, make sure that it is applied to the entire object.

3) Make sure that all faces have a Multi/Sub-Object Sub-Material or Standard material applied to them.

4) Make sure that the mesh geometry does not have isolated (unused) vertices.

5) Make sure that there are no double faces or polygons (faces or polygons that occupy the exact same space and share the same vertices).

6) Check for double edges or illegal faces or polygons.

[HMC Helljumper]

how would one fix a double edge?