Has anybody else experienced random duct connections breaking in MEP 2013? I've been working on duct layout for a theater for a couple days... up til today the ducts & fittings connected just fine. I went and customized the rise/drop symbols, and after regenerating the drawing every one of the duct connections (fitting to duct or, duct to duct, or fitting to fitting) had the little warning graphic and a "duct connector is not connected" error message.
the customization on the rise/drop symbols was merely changing the colors & linetypes in the existing rise/drop blocks. Don't see how that would mess up or corrupt the drawing file & connections.