The quickest fix is to re-register or replace the problematic DBX file.
The screen didn't close. Instead, every solid object in her model—every pipe, every flange, every valve—began to un-stitch . Surfaces peeled apart like the skin of an orange. The beautiful Boolean union she had created six hours ago dissolved into a thousand floating, razor-sharp faces.
The hourglass appeared. It didn't spin. It just sat there, a grim digital tumor in the center of the screen.