HATE when this happens.

I am reviewing a building that has several floors. The owner wants a window evaluation for new windows on the lower floors. These windows are LARGER than the existing windows.

So I deftly came up with the base Wizard model. Ran fine.

Then I created a copy, calling it Modified Windows. I changed the window dimensions (and count) using the Custom Window Design. In saving it, I got an "unknown error" message.

Any one ever have this happen?

John R. Aulbach, PE