The fluorescent hum of the office at 11:00 PM was a sound that Ethan had long stopped hearing. What he couldn’t tune out, however, was the blinking cursor on his monitor, mocking him.
This is a known bug in standard releases. The Extra Quality version includes StormStruct_fix.ocx . Register it manually:
He launched Civil 3D. The software loaded, heavy and sluggish as usual, but when he clicked the Hydraflow icon in the toolbar, a crisp, clean window popped up instantly. There was no lag. No "Loading..." spinner of death. It was the hydrograph tab, sharp and responsive.