Actually, I can't duplicate. I got I similar-looking error message when I compiled. In my case, the error was due to me not having updated a item in project.ini to match my system.
But, further analysis of the error message you received indicates a missing base model, i.e. Imbedded.mdl. The missing .mdl is in the 4.5.2.13 archive, For whatever reason, it didn't make its way into your system when you updated. Copy the BaseModels folder from the archive into your system and the error should be no more.
Incidentally, ground-illuminating standards may not work in that release. I've fixed the problem and anticipate a new release in the next day or so.