Hi Pierre!
It looks like you're missing a number sequence for the current stores statements. This could be setup in two ways, either:
Use the number sequence wizard
OR
Navigate to [Legal Entity]/Organization Administration/Common/Number sequences/Number sequences
1. Press the New Number Sequence button
2. Choose Scope: Operation Unit
3. Choose Operating Unit: Retail Channel
4. Select your store that you are trying to calculate a statement for.
5. In References click on Add
6. In Area choose RBO Store
7. In Reference choose Statement Number.
8. Click OK.
9. Just setup the other parameters of the number sequence as you like.
Best Regards,
Lars