When error 2724 flags in COLLECT, this means that the Qualification Award for the Programme of Study has been added incorrectly.
Go to School > School Structure > Programmes of Study and select the programme and programme instance the student is enrolled into.
Click into the Linked Qualification Award and check whether you have linked it to an award from the exam section, or if you have given a placeholder.
If you have given a placeholder qualification award reference, ensure this is in the correct format. For example, 603/205/11 would cause the error, but 60320511 wouldn’t.