Hi,

I'm getting the following error which causes the program to abort:

The instruction at "0x73dd11c7" referenced memory at "0x00000004". The
memory could not be "read".

The changes which seem to cause this error are lowering the lighting
power density or shading coefficient. When I revise these numbers back
up the error is gone, but I need to lower my numbers to simulate the
building.

I don't know if the error is caused by these changes or if it may be
Windows based. Any suggestions?

Thanks,

Richard Yam, P. Eng.