AECOsim clip volume-element display


I am a beginner in this and I am not sure what am I doing wrong.

But when I triy to do a clip volume using 'section clip tools' not all the elements are showing. In this model consists of walls, slabs, beams and columns only columns and beams are visible in the clip. I tried different display styles but of no use. Could any one please help me?


Many thanks,