Error in Shopping cart created against Contract
We have contract for particular material in backend system. When we create a shopping cart using Internal Goods and Services option. The contract with correct line item appears in Source of supply section. When we select this paticular contract an click on 'assign vendor'... the selected contract /line item appears but the price comes as '0.00'.
once we click on 'Check' further the following error messages get displayed:
1. Pls select contract as contract already exist for material
2. ls enter UOM (when the materials has been entered earlier, it had shown correct UoM 'UN', once we click on assign vendor, UoM disappears from Shoppin cart line item)
What can be an issue here..... ?
Can any error in backend system data can cause this problem... 1. Price comes as 0.00 though contract and line item identified correctly and 2. UoM error
(The ISO Code for UoM 'UN' has not maintained in backend system in CUNI Tcode)