Warning if there is no window in the simulation

Program Version,EnergyPlus 1.2.1.022, 4/9/2008 3:09 AM,IDD_Version 1.2.1.022
** Warning ** Sum of area times inside solar abs for all surfaces is zero in Zone: ZONE01
** Warning ** Zone areas*inside surface emissivities are summing to zero
** Warning ** As a result, MRT will be set to MAT for that zone
************* Testing Individual Branch Integrity
************* All Branches passed integrity testing
************* Testing Individual Supply Air Path Integrity
************* All Supply Air Paths passed integrity testing
************* Testing Individual Return Air Path Integrity
************* All Return Air Paths passed integrity testing
************* No node connection errors were found.
************* EnergyPlus Completed Successfully-- 4 Warning; 0 Severe Errors; Elapsed Time=00hr 00min 1.00sec