Unable to Castle

Hi. I'm unable to castle Queen side in a game (i.d. 14275736 - Black), even though my King is not under any direct attack from the opponent from what I can see. Why is this?
Is there a problem with the chess program? Thanks.

@khandita108 said
Hi. I'm unable to castle Queen side in a game (i.d. 14275736 - Black), even though my King is not under any direct attack from the opponent from what I can see. Why is this?
Is there a problem with the chess program? Thanks.

Game 14275736
It is not only the starting and ending position for the King you may not be under attack, but also all fields he would traverse...

@Ponderable
Thank you. That is indeed the case here.