Requisition has different doc. type NB and item cat

Question

hi all,
i got one PR from project system account assignment category N  item category standard
but i am converting that pr to subcontracting PO  i am getting following error" _Requisition has different doc. type NB and item cat"_

Answer 1

Hi, I came across an alternative solution to do subcontracting with project stock. From the online documentation:
Subcontracting for Sales Order Stock and Project Stock
Purpose
Subcontracting is also possible in conjunction with sales order stocks and project stocks. The subcontracting orders are account-assigned to a sales order or a WBS element. Thus, the components are not transferred (using a transfer posting) to the "stock of material provided to vendor" but are directly withdrawn from the sales order stock or the project stock at the time of the goods receipt. The material manufactured is also posted to the sales order stock or to the project stock. The cost of subcontracting is then debited to the sales order or WBS element.
Since the components are not transferred to the "stock of material provided to vendor", we recommend that you use a transfer posting to transfer the provided components to a new storage location (for example, 9999). This enables you to obtain an overview of those stocks that are physically located at the subcontractor. This information is particularly important when you carry out a physical inventory of the sales order stocks and project stocks.
Features
Withdrawal from Stock of Mat. Provided or Sales Order/Project Stock
For components that are managed in sales order stock or project stock, you can define whether the components are to be withdrawn directly from each sales order/project stock or from the stock of material provided to vendor. You manage this via the dependent requirements indicator for individual customer requirements and collective requirements (MARC-SBDKZ).
You can maintain this indicator in the following places:
in the MRP view of the material master record (MRP 4)
in the explosion types for the BOM item (in Customizing for Production in the step Basic Data -> Bill of Material -> Item Data -> Define explosion types)
Configuring the explosion types has priority over the configuration in Inventory Management.
If the indicator is set at Collective requirements only (2), the materials are withdrawn from the stock of material provided to vendor. If this indicator is set any other way, the system withdraws materials from sales order stock or project stock
Regards,
Mario