"Error 424 3Dmode: Object Required"

[Ezxariarch]

I was mkaing my new map, and I was in 3d mode. Everything was working just fine, then all of a sudden, it said "Error424 edmode: Object Required"/ Ok, So i thought it was missing the 3d mode object start. So i placed one. And it worked ok, UNTIL i left the sector that object was in. Then I got the error again. I placed the 3d mode object elsewhere, and the 3d mode still still crash and give me this error. Anyone know how to fix this?

[Bloodshedder]

I'm guessing this is a software bug and it has nothing to do with the placement or existence of a 3D mode start.

[Ezxariarch]

actually., I fixed it. I had a flat that was not specified in the wad. whenever i go into a place that can see this flat, it crashes. after removing this unspecified flat, i got it working again.

[TwinBeast]

I've usually just got some white texture with a question mark if there's a flat missing.