I was spinning my wheels trying to figure out why half my Dref corridor vanished from my section views this morning. Come to find out one of our staff had isolated a region in the source corridor, saved then closed out before un-isolating. Poof, un-isolated corridor sections vanish from Dref'd drawings. The cross-section models showed up in the group section properties, but the Draw check box was unchecked and could not be checked.
