Conversation so far:
what was principal photography?
Principal photography is the phase of film production in which the bulk of the movie is filmed, with actors on set and cameras rolling.
Where was Film City?
Film City is an integrated film studio complex situated near Sanjay Gandhi National Park at Goregaon East, Mumbai in India.
What did the Om Shanti Om filming schedule say after it was completed?
It was then reported that filming for Om Shanti Om would move outdoors after Shah Rukh completed filming for Kaun Banega Crorepati.
Did the filming of Om Shanti Om move outdoors?

Question: did they have problems with the schedule?
Self-contained rewrite: Did the crew of Om Shanti Om have problems with the schedule?