How To Fix VMP_MSG336 - Cannot modify quantity of manufacturing substitute

SAP Error Message - Details

• Message type: E = Error

• Message class: VMP_MSG - VMP Message Manager

• Message number: 336

• Message text: Cannot modify quantity of manufacturing substitute

What causes this issue?

The component for which you want to edit the quantity has a
manufacturing substitute.

System Response

How to fix this error?

If you want to modify the quantity of a manufacturing substitute, use
<LS>Assign Manufacturing Substitute </>option in the <LS>Working</>
panel.

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message VMP_MSG336 - Cannot modify quantity of manufacturing substitute ?

  SAP Error Message:
  
  VMP_MSG336: Cannot modify quantity of manufacturing substitute
  
  Cause:
  This error occurs when you try to change the quantity of a manufacturing substitute in a production order or process order, but the system does not allow it. Manufacturing substitutes are alternative materials or components defined in the bill of materials (BOM) that can replace the original component during production.
  The system restricts quantity changes for manufacturing substitutes because:
  
  The substitute is managed as a fixed alternative with predefined quantities.
  Quantity changes are only allowed for the original component, not for the substitute.
  The substitute might be controlled by specific configuration or master data settings that prevent quantity modification.
  The production order or process order status or settings may restrict changes to substitute quantities.
  
  
  Solution:
  To resolve this error, consider the following steps:
  
  
  Check BOM and Substitute Settings:
  
  Verify the BOM for the production order.
  Confirm that the substitute is correctly defined as a manufacturing substitute.
  Understand that the quantity of the substitute is derived from the original component quantity and cannot be changed independently.
  
  
  
  Modify Quantity on Original Component:
  
  Instead of changing the quantity of the substitute, change the quantity of the original component in the order.
  The system will automatically adjust the substitute quantity accordingly.
  
  
  
  Review Order Status:
  
  Ensure the production/process order is in a status that allows changes (e.g., not released or confirmed).
  If the order is already confirmed or partially processed, quantity changes might be restricted.
  
  
  
  Check Configuration:
  
  Review configuration settings related to manufacturing substitutes in the IMG (Implementation Guide).
  Some settings might restrict quantity changes for substitutes.
  
  
  
  Use Correct Transaction:
  
  Use the appropriate transaction or screen to make changes.
  For example, use CO02 (Change Production Order) or COR2 (Change Process Order) and modify the original component quantity.
  
  
  
  Consult SAP Notes:
  
  Check SAP Notes for any known issues or patches related to this message.
  
  
  
  
  Related Information:
  
  
  Manufacturing Substitutes:
  
  Manufacturing substitutes are alternative components defined in the BOM to allow flexibility in production. They are used when the original component is unavailable or to optimize production.
  
  
  BOM Management:
  
  The BOM defines the relationship between the original component and its substitutes, including quantities and conditions.
  
  
  Order Types and Status:
  
  Some order types or statuses restrict changes to components and substitutes to maintain production integrity.
  
  
  SAP Transactions:  
  
  CO02 - Change Production Order  
  COR2 - Change Process Order  
  CS02 - Change BOM
  
  
  
  SAP Notes and Documentation:
  
  Search SAP Support Portal for notes related to VMP_MSG336 or manufacturing substitutes.
  
  
  
  If you need further assistance, please provide details such as the transaction used, order type, and the exact steps leading to the error.