How To Fix CO391 - No requisition exists for sub-operation & &

CO391 - Overview

• Message type: E = Error

• Message class: CO - PPC order processing messages

• Message number: 391

• Message text: No requisition exists for sub-operation & &

What causes this issue?

You want to display the purchase requisition of a sub-operation.
However, no purchase requisition exists for the sub-operation.

How to fix this error?

You need to change the control key of the sub-operation. Maintain a
control key which requires the sub-operation to be carried out
externally (On the detail screen of the control key, the indicator
'ExtProc' must be set to <ZH>External processing obligatory</>). If
this indicator is set, the system automatically creates a purchase
requisition for the sub-operation when the production order is saved.

Error message extract from SAP system. Copyright SAP SE.

CO391 - Details

• The SAP error message CO391 ("No requisition exists for sub-operation & &") typically occurs in the context of production planning and control, particularly when dealing with production orders and their associated operations and components. This error indicates that the system cannot find a requisition (such as a purchase requisition or a stock transfer requisition) for a specific sub-operation in a production order.
  Causes:
  
  Missing Requisition: The most common cause is that there is no requisition created for the specified sub-operation in the production order.
  Incorrect Configuration: The configuration of the production order or the routing may not be set up correctly, leading to missing requisitions.
  Data Inconsistency: There may be inconsistencies in the master data, such as material master records or BOM (Bill of Materials) that prevent the system from generating the requisition.
  Incomplete Planning: The planning process may not have been completed, or the necessary planning runs have not been executed.
  Authorization Issues: Sometimes, the