Won't start after door open?

[jakeru]

If it's a manual transmission, did you push in fully on the clutch pedal?

If you don't push the clutch in far enough to activate the electrical clutch interlock switch, it will prevent the starter motor from cranking.

[rick3000]

Originally Posted by jakeru

If you don't push the clutch in far enough to activate the electrical clutch interlock switch, it will prevent the starter motor from cranking.

To add to this, it could also be the clutch switch going bad.
This is going to be hard to figure out without a lot more detail, it could be a lot of different things.