Still, i now try to find the guy before sending to research and check if he is outside the GP.
Well said Redeagle55.
I think this is the solution to the problem of disappearing doors and patients geting stuck into GP's offices.
These two problems happen when a patient is in a GP's office, a fax with a ? pops up asking you what to do, and you decide to send the patient to research.
THE PROBLEM IS that if you click the ? fax TOO fast (that is before the patient exits the GP's office) you either get the patient stuck in the office, or the doors disappears (which is worse because the office is useless afterwards). This problem can happen a lot, especially if you have lowered the speed of the game.
(The only thing you can do after this, is to order the patient to go home but that is bad for your reputation and also doesn't work every time. If the door disappears, just reload, there is no remedy)
So my SOLUTION is to wait until the patient exits the GP's office and closes the door, and THEN click the fax with the ? to decide what to do with the patient (usually send him to research).
If you have many rooms and a lot a people running around look for the patient with a ? above his head (his status will be ''awaiting your decision'' in the lower right box). When he is finally out of the Gp's office, then click the ? fax.
I have been following this rule for the last 4 stages and not a single door disappeared. Also no patient got stuck in the office. (except when I forget this problem and just click at everything as fast as I can)
Also remember that keys 1,2,3,4,5 control the speed of the game from slowest to fastest. It is usefull to lower the speed when looking for the patient with the ? above his head.