Hi Toby,
That appears a bit strange - did an error message precede this by any chance? You should in any case be able to manually delete the surfaces - please see here.
Shane Regan | Principle Building Performance Support EngineerHevacomp to OpenBuildings - A complete guide for every user | Bentley Communities
Answer Verified By: Toby Norris
Hi Shane thanks for response, i was able to delete the room via that method.
I will note that there is an error message as following: Value entered (1) is more than the recommend maximum value (0.99) in the 'Internal services field' Although i'm not sure that had anything to do with it.