We have GATP active with Allocation check, then Availability then Product Substitution (using GATP RBA conditions and rules).
This scenario is working fine, but we have a problem when the substitution occurs and the new material is listed. SAP allow us to save Sales Order with the listed material.
Material A (listed for sales) - 0 stock.
Material B (not listed) - 200 stock
Sales Order with 100 peaces
Material A (listed for sales) - 0 stock
Material A (listed for sales) - confirmed 0
Material B (not listed) - confirmed 100
The problem is because Material B is listed, substitution should not occur, or VA01 should shown error message (Material B is not listed and therefore not allowed).
Can you guys please help me?