I've tried to force it in singleplayer (map: "What could possibly go wrong? (3p)") and got the OutOfMemoryError.
But even with debug build it only gives a very short message. (Probably not different from release build?) I've just attached it for completeness. (Old laptop, Win 7, 4 GB RAM, ca. 1,7 GB for graphics (shared memory, only 64MB dedicated on graphics card))
The taskmanager said that I've used approx 3 out of 4 GB available for me. (Lix ate up about 1,8 GB at this point. That is really much for this kind of game though not generally. But my laptop uses shared memory, so that graphics memory is to a big part handled via RAM as well.)
I will try to run against Allegro debug libraries but can't promise anything