The map is 130mb, and has a bunch of custom textures and a couple custom models. None are greater than 10mb.

Any ideas what's causing this error?

RectorRocks wrote:
I thought the maximum file size of a map should be no larger than 100MB?

I was under the impression it was 200...you might be right though.

EDIT: So it's 100mb, you were right. I guess I'll have to try and get the filesize down then.

As for file size; yea, portal 2 is still at 100 mb

Dr.Toaster Waffles wrote:
130 mb for a Portal 2 level! What is IN this map?

It's more of a matter of what
puts on sunglasses and speaks in deep voice
ISN'T in the map.

Gets slapped by everyone on TWP.com

Edit: Sorry for the off topic... I just had to. Anyways, try eliminating some large brushes, making more surfaces nodraw, converting custom sounds to .mp3 instead of .wav (maybe), increasing lightmaps for far off areas, decrease named lights/lights with effects, and removing unnescesary detail. (Detail that the player can only see for a split/second.

The original map had dimensions in the excess of 12800x12800x12800 (although it wasn't all connected, it had world portals connecting some parts), with a fair amount of custom textures and such. I went through the map, made a lot of faces have higher lightmap scales, checked all my textures were DXT5, but finally decided the easiest way is splitting it into two parts. Kills the pacing a little, but it works to get the size down, plus looks natural.