How To Fix MPN02001 - Part & is not a leading part, planning is not allowed

SAP Error Message - Details

• Message type: E = Error

• Message class: MPN02 - MPN Message: Materials Planning

• Message number: 001

• Message text: Part & is not a leading part, planning is not allowed

What causes this issue?

Material requirements planning for inventory-managed manufacturer
parts, which are organized in
<DS:GLOS.3608C3DABA271348E10000009B38F91F>MPN-MRP sets</>, only takes
place on the <DS:GLOS.360B297326F41628E10000009B38F984>leading material
</> of the set. Therefore, the requirements planning run for an MPN-MRP
set is only triggered by the leading material. Material &V1& in
plant/MRP area &V2&/&V4& is part of an MPN-MRP set, for which Material
&V3& is the leading part.

System Response

Processing is terminated.

How to fix this error?

Carry out requirements planning for material &V3& in the same plant/MRP
area.

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

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message MPN02001 - Part & is not a leading part, planning is not allowed ?

  The SAP error message MPN02001, which states "Part & is not a leading part, planning is not allowed," typically occurs in the context of Material Requirements Planning (MRP) when dealing with multi-level BOMs (Bill of Materials) and planning scenarios involving variant configuration or similar setups.
  Cause:
  
  Non-Leading Part: The part in question is not designated as a leading part in the context of the planning scenario. In SAP, a leading part is usually the main component that drives the planning process, while non-leading parts are secondary components that do not initiate planning.
  Configuration Issues: The material may not be properly configured in the system, or it may not be set up to be planned in the way you are attempting.
  BOM Structure: The BOM structure may not be correctly defined, leading to the system not recognizing the part as a valid component for planning.
  Planning Strategy: The planning strategy assigned to the material may not allow for planning of non-leading parts.
  
  Solution:
  
  Check Material Master: Verify the material master data for the part in question. Ensure that it is set up correctly and that it is marked as a leading part if that is appropriate for your planning scenario.
  Review BOM Configuration: Check the BOM configuration to ensure that the part is included correctly and that the structure is valid. Make sure that the leading part is correctly defined in the BOM.
  Adjust Planning Strategy: If the planning strategy does not allow for the planning of non-leading parts, consider changing the strategy or adjusting the configuration to allow for the necessary planning.
  Consult Documentation: Review SAP documentation or consult with your SAP support team to understand the specific requirements for your planning scenario and how to configure the materials accordingly.
  Use Transaction Codes: Utilize relevant transaction codes such as CS03 (Display BOM) or MM03 (Display Material) to check the details of the material and BOM.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional guidance on configuration.
  Training and Documentation: Consider reviewing training materials or documentation related to MRP and BOM management in SAP to better understand the concepts of leading and non-leading parts.
  Community Forums: Engage with SAP community forums or user groups where similar issues may have been discussed, and solutions shared.
  
  If the issue persists after following these steps, it may be beneficial to engage with your SAP support team or a consultant who specializes in SAP MRP and BOM configurations.