How To Fix VMP_MSG345 - Material &1 cannot be assigned as a manufacturing substitute

SAP Error Message - Details

• Message type: E = Error

• Message class: VMP_MSG - VMP Message Manager

• Message number: 345

• Message text: Material &1 cannot be assigned as a manufacturing substitute

What causes this issue?

Material &V1& cannot be assigned as a manufacturing substitute.

System Response

If the material is an assembly in the <LS>Target</> Panel<(>,<)> the
system cannot assign the material as a manufacturing substitute.

How to fix this error?

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_MSG345 - Material &1 cannot be assigned as a manufacturing substitute ?

  SAP Error Message:
  
  VMP_MSG345 Material &1 cannot be assigned as a manufacturing substitute
  
  Cause:
  This error occurs when you try to assign a material as a manufacturing substitute in the SAP system, but the material does not meet the necessary criteria to be used as a substitute in the manufacturing process.
  Common reasons include:
  
  The material is not flagged or configured as a valid substitute material in the system.
  The material's status or master data settings prevent it from being used as a substitute (e.g., it is not a production-relevant material).
  The material does not belong to the same material group or does not have compatible characteristics required for substitution.
  The substitute assignment is attempted in a context where the material is not allowed (e.g., in a BOM or routing where the substitute is invalid).
  
  
  Solution:
  To resolve this error, check and correct the following:
  
  
  Material Master Data:
  
  Verify that the material intended as a substitute is correctly maintained in the material master.
  Ensure the material is flagged for production or manufacturing use (e.g., MRP type, procurement type, and plant data are correctly maintained).
  Check if the material is active and not blocked for production.
  
  
  
  Substitute Configuration:
  
  Confirm that the substitute material is assigned properly in the substitution setup.
  Use transaction CS11 (BOM) or CS02 (Change BOM) to check if the substitute is allowed in the BOM.
  Check substitution rules in transaction V/74 (Substitution for BOM components) or relevant substitution configuration.
  
  
  
  Material Group and Characteristics:
  
  Ensure the substitute material belongs to the same or compatible material group or has matching characteristics required for substitution.
  
  
  
  Check Plant and MRP Settings:
  
  Verify that the substitute material is valid in the plant where substitution is attempted.
  Check MRP and production-related views in the material master.
  
  
  
  Authorization and Customizing:
  
  Ensure you have the necessary authorization to assign substitutes.
  Review any custom validation or user-exits that might restrict substitution.
  
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  CS02 - Change BOM
  CS11 - Display BOM
  MM02 - Change Material Master
  V/74 - Substitution for BOM components
  MM03 - Display Material Master
  
  
  
  SAP Notes and Documentation:
  
  Check SAP Notes related to BOM substitution and material master settings.
  Review SAP Help Portal documentation on BOM and substitution.
  
  
  
  Typical Use Case:
  
  Manufacturing substitutes are used to replace components in BOMs during production if the original component is unavailable or to allow flexibility in production.
  
  
  
  
  If after checking the above points the issue persists, consider debugging or checking with your SAP support team for any system-specific customizations or restrictions.