The dimension combination offers great functionality to block the use of two dimension values when posting documents. However, the check is on the moment of posting. For a user who is inserting sales lines, it would be usefull if the check is on the insert of the line and not on posting; that is too late.

Example: customer had dimension value X
Item has dimension value Y.
Combination X and Y is blocked.

Current solution: sales line can be created, but posting is not possible.
Idea: show error/warning when inserting the sales line for this item.