videocamera and shaders were the root of my problem, luckilly I had renamed the originals to .bak, though it took me a minute to realize it :-(

Once i restored those two files everything ran fine.

I am getting the error as well, found my patch log and this was the problem.

Applying DFC Update for 'Game\Bin\Shaders_Win32.precomp'
Error: err0031 - Invalid file found

Problem being i don't recall ever altering or modifying that file...any clues?

Looking at the map it appears that the 20x30 designation is reserved for lots that only have street access on the 20' side.  If the 20x30 lot is on a corner it uses the 30x20 since the 30 side does have street access.

Hope that helps.