Our requirement is, always to create the reservation for certain product categories. In IMG Define objects in bakend system , for that particulat product category and purchase group ,maintained the following
internal procurement ->Always reservation for the the materials subjected to inventory management
Ext Procurement -> did not maintain any value . blank value is maintained.
The reservation is getting created in the backend system , whenever the shopping cart is approved . In case the material is locked in the backend system , Purchase requisiton is created which we don't want this to happen . Actually our requirement in this situation is that the Shopping cart should fail so that the same can be processed again from the application monitor.