Hi All!

Occasionally, I have made an object, for example, a box (one room house) that has been opened by placing a negative box just inside the original.  Works fine.  As I begin to add windows and doors, I end up running into one that will not work.  Such as today, everything worked, ubtil I tried to make a hole for the doorway and no matter what I have tried, I cannot get an opening.  I have ensured that the primary object is "positive" and the block for the hole is "negative".  There is nothing in the way and the primary object is grouped completely and "positive".  Any hints from you guys?  It's becoming frustrating...

Thanks in advance!

The most exciting phrase to hear in science, the one that heralds new discoveries, is not 'Eureka!' (I found it!) but 'That's funny ...'
Isaac Asimov (1920 - 1992)