The error reporting thing is just a code name for that particular building and isn't any sort of problem, it's just for tracking. There is nothing wrong with your install.
EB is officially a beta and isn't completely finished. (Though, there are many games and mods that have their final release with more bugs than EB.) The only real things that point to the beta-ness of EB is building description problems.
You only need to remove the map.rwm when you upgrade one version of EB to another or you are having bug problems. Then it would be the one in the "...Rome - Total War\EB\Data\world\maps\base\" folder.
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