Hi everyone ! ) I am a novice user, I encountered an error when tracing a room. (Probably too big)// Run-time error 13. what to do ??)

Thanks Michael - I have tested the dxf and it works fine here in a new Design Database project. 

Please check your regional settings - see Regional Settings for International Windows Versions - Hevacomp Wiki - Hevacomp - Bentley Communities

I should also mention, in case you are not aware, the latest version of these capabilities is available in OpenBuildings Energy Simulator, please see below for further info:

OpenBuildings Energy Simulator - OpenBuildings | AECOsim | Speedikon Wiki - OpenBuildings | AECOsim | Speedikon - Bentley Communities