Reality Factory

it is:

** BSP Compile Version: 15
** Build Date/Time: Jan 31 2005,06:32:56
--- Load Brush File ---
Num Solid Brushes : 6
Num Cut Brushes : 0
Num Hollow Cut Brushes : 0
Num Detail Brushes : 0
Num Total Brushes : 6
--- Remove Hidden Leafs ---
PlaceEntities: No valid entities for operation 74 ...

I downloaded RFEditpro yesterday and after like 15 minutes i tried to preview a room and it said error compiling level

Please help!