Originally Posted by
baflyer2
Did you put in your AS number at booking? If so, was your AS number removed when you tried to check in?
The Manage Booking webpage on the Singapore Airlines website only allows you to add a Krisflyer membership number (not a partner frequent flyer programme membership number). It is only possible to add a partner frequent flyer membership number when checking in. This problem has been discussed in another thread:
How can I add United MileagePlus number in Singapore flight bookings.