#83 Problem with the simulation

[Chiara]

Hi, I'm an italian student at Politecnico of Milan. I have to learn to use Energyplus and Open Studio for an exam.
I've got a question about the Simulation.. The software finds this problem:
Program Version,EnergyPlus-32 7.0.0.036, 06/07/2012 09:04,IDD_Version 7.0.0.036
** Warning ** GetSurfaceData: CAUTION -- Interzone surfaces are occuring in the same zone(s).
what does it mean?