Nav Mesh unable to save

[LordTrilobite]

So I got this weird problem.
I wanted to make a navigation mesh for my map. And after fiddling a bit, generating several floors after marking spots as walkable worked fine. And it did save.
But when I go into edit mode, edit some things and try to save it with nav_save. It then says I need to do a full nav_analyse.
When I do that I get this message every time. And all the changes I made after the initial generation are undone.

"ERROR: Cannot save navigation map"

And this is the map: [url]http://steamcommunity.com/sharedfiles/filedetails/?id=169044808&tscn=1376416581[/url]

I've googled for the problem and I saw that several people had the same message, but I wasn't able to find a solution anywhere. Does anyone have an idea how to fix this?

[veDemaG]

You need to run nav_analyze before nav_save.

[LordTrilobite]

Yes, that's what I said. When I run nav_analyse. It analyses the map, says it cannot save the nav mesh and then reloads the map without the changes. So I cannot run nav_save since nav_analyse already deleted all my changes.

Edit:
I just tried analysing before changing anything, and then saving. Still the same happens.

I get this error with both nav_analyse and nav_save.
"Unable to save 46309376 bytes to C:\Program Files (x86)\Steam\steamapps\common\GarrysMod\garrysmod\maps\rp_kashyyyk_jungle_b1.nav
ERROR: Cannot save navigation map 'C:\Program Files (x86)\Steam\steamapps\common\GarrysMod\garrysmod\maps\rp_kashyyyk_jungle_b1.nav"

As well as this error.
"Nav File is wrong or something (4)"

Can anyone help?

[Stiffy360]

Gonna take a shot in the dark, but have you tried running garrysmod as an administrator?

[LordTrilobite]

Was worth a shot, but that didn't work either. Thanks for the suggestion though.

[Stiffy360]

[QUOTE=LordTrilobite;41833557]Was worth a shot, but that didn't work either. Thanks for the suggestion though.[/QUOTE]

Try building the nav in CSS? Or Tf2?
That may work.

[LordTrilobite]

I copied the map and nav file into CSs, did nav_analyze ingame and it seems to have worked.
Thanks a bunch!

[Stiffy360]

[QUOTE=LordTrilobite;41834807]I copied the map and nav file into CSs, did nav_analyze ingame and it seems to have worked.
Thanks a bunch![/QUOTE]

Does it work in gmod though? try placing that mossman npc in the entities tab. I think it uses nextbot.

[LordTrilobite]

It, uhm, seems to crash the map. And it's definitely the changed nav file that crashes the map, because when I change back to the old unedited nav file the map works again.

Could the crash be caused by the different version of the Source engine?