Yep?

Edit:
I do have a MDMP crash dump, however, I have no idea how to read it.

When the TTT.fgd is loaded, placing a non-TTT weapon or ammo entity will cause my Hammer to instantly crash.
Without the FGD loaded everything is working correctly.

Anybody else have this problem?

You need to load TTT's FGD file in Hammer.
Please read the whole guide:
http://ttt.badking.net/mapping-guide

Terrific! Both the beam and brush are functioning properly now.
Thanks for fixing :)

Yeah, sorry, I somehow managed to not turn the beam on.

Updated testmap:
http://iostream.se/stuff/ttt_deletedentities.zip

The problem seems to be with parenting.
I added another beam now, and parented its info_targets' to the func_door, and they are gone after cleanup.

The beam with its info_targets' not-parented is visible though.

Ah, I see.
GMod shouldn't just delete entities though. Kinda weird.

I have only experienced problems with func_brush and env_beam at the moment, but I'll try to hunt down some more.

Anyway, I threw together a sample map with a beam and brush:
http://iostream.se/stuff/ttt_deletedentities.zip

The env_beam is removed if it's got a name.
The func_brush is removed if it's parented to something (a func_door in this map) but doesn't need a name.


Keep up the good work man :)

It seems as if TTT is removing some entities on load - causing a headache when mapping.
I'm pretty sure this is for a good reason, although I can't see why.

I've only seen func_brush and env_beam being affected by this yet, but there are probably more of them getting deleted.

So how should I create my awesome laser scanning machine thingy of awesomeness if I can't use lasers? :(