Help - I cannot upload my assignment and I have scheduled my exam for today
This happens quite often. Currently Sun are kind enough to allow candidates to upload after sitting the exam. Make sure you do send an email to prometric to tell them that you cannot upload, and keep a copy of the email. And upload as soon as Prometric tell you that they have fixed your permissions!!!
Do not rely on this happening though - Sun do object if people deliberately plan to take the exam before the upload though, and if they feel that this situation is being abused, they may force people to follow the rules.