ChiefChris1 Posted April 4, 2018 Share Posted April 4, 2018 I've gotten this error message once before. It doesn't make any sense to me. I'm adding a transom over a door and I want to block them together. The sidelights are blocked. The windows overtop are blocked. But it won't let me block top to bottom. I'm doing this the same way I've done it for 20 years. This bugs me. What is an opening with a non-flat top?? Link to comment Share on other sites More sharing options...
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