His fixes generally involve getting to know your characters or story better, through the use of automatic writing, biographical sketches, and the like. But his advice is so useful that you'll forgive him his facile phrasemaking. All writing is rewriting.
All screenplays have problems.
They nearly shelved Platoon -until Oliver Stone rewrote the first ten pages and created a classic. They happen to every screenwriter. But good writers see their problems as a springboard to creativity. Targeted national ads. I would carry Syd Field around in my back pocket wherever I went.