Batchmode using a DLL that references UnityEngine.dll and UnityEditor.dll crashes

Hi all,

I'm using te PRO version of Unity 4.3.3. I'm trying to build a project for windows using TeamCity, which uses unity's batchmode. Everything works just fine for all my projects, as long as I don't use a c#-dll, that has some unity specific code and therefore references unity's UnityEngine.dll and UnityEditor.dll. In that case the batchmode build fails, throwing a FileNotFoundException ("UnityEditor could not be found")

By the way, I don't want to use unitypackage for that, beacuse my projects reference the dll by svn externals, so I make sure, these projects get the most recent version automatically.

Thanks in advance!

EDIT: as I posted here this seems to be a general problem and has nothing to do with the batchmode.