you might just be right but funny enough it extracts other feature solid references apart from this particular object. The software is Structural Modeller (SELECT Series 1) - V-08.11.07.90
One other thing i have discovered is that the object displays partially (without any form of clipping applied on it) with transparent and smooth display styles but displays fully with wireframe. this is strange...see image below illustrating object at various display styles.
Could the object be corrupt?????????
WIREFRAME
TRANSPARENT
SMOOTH
i look forward to hearing from you Steve
thanks
regards