How To Fix MD431 - &1: &2 (S4)

SAP Error Message - Details

• Message type: E = Error

• Message class: MD - Material Requirements Planning (MRP)

• Message number: 431

• Message text: &1: &2 (S4)

What causes this issue?

A phantom assembly could not be exploded in a BOM explosion for the
planned order or the subcontracting purchase requisition.

System Response

If no BOM exists for the phantom assembly, the new phantom assembly is
treated as a stock component.
If at least one BOM exists for the phantom assembly, but this BOM is
inactive or invalid (for example, in relation to the order date or lot
size), the system copies the phantom assembly without components to the
order.
This exception message only appears in the MRP list.
It only appears for new or recently exploded orders.

How to fix this error?

Check the BOM for the phantom assembly in the planned order or
subcontracting purchase requisition.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message MD431 - &1: &2 (S4) ?

  The SAP error message MD431 typically relates to issues in the Material Requirements Planning (MRP) process, specifically when there are problems with the planning of materials. The error message format you provided indicates that it is a specific error related to a material or a planning situation.
  Cause of MD431 Error
  The error message MD431 usually indicates that there is a problem with the planning data for a material. Common causes include:
  
  Missing Master Data: The material master data may be incomplete or missing essential information, such as MRP type, lot size, or planning parameters.
  Incorrect MRP Type: The MRP type assigned to the material may not be appropriate for the planning scenario.
  Planning File Entry Issues: There may be issues with the planning file entries, which can prevent the system from processing the material correctly.
  Stock Levels: The stock levels may not meet the requirements for the planned orders or production orders.
  Configuration Issues: There may be configuration issues in the MRP settings that affect how materials are planned.
  
  Solution for MD431 Error
  To resolve the MD431 error, you can take the following steps:
  
  
  Check Material Master Data:
  
  Go to the material master (transaction code MM03) and verify that all necessary fields are filled out correctly, especially in the MRP views.
  Ensure that the MRP type is appropriate for the material.
  
  
  
  Review MRP Configuration:
  
  Check the MRP configuration settings in the system (transaction code OMD0) to ensure that they are set up correctly for the materials in question.
  
  
  
  Analyze Planning File Entries:
  
  Use transaction code MD21 to check the planning file entries for the material. Ensure that the entries are correct and up to date.
  
  
  
  Check Stock Levels:
  
  Review the stock levels for the material using transaction code MMBE to ensure that there is sufficient stock to meet the requirements.
  
  
  
  Run MRP Again:
  
  After making the necessary corrections, run the MRP process again (transaction code MD01 or MD02) to see if the error persists.
  
  
  
  Consult SAP Notes:
  
  Check the SAP Support Portal for any relevant SAP Notes that may address this specific error message or provide additional troubleshooting steps.
  
  
  
  Related Information
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as MM03 (Material Master), MD21 (Planning File Entries), MD01 (MRP Run), and OMD0 (MRP Configuration).
  Documentation: Review SAP documentation related to MRP and material planning for a deeper understanding of how the system processes planning data.
  SAP Community: Engage with the SAP Community forums for insights from other users who may have encountered similar issues.
  
  If the problem persists after following these steps, it may be beneficial to consult with your SAP support team or a consultant who specializes in MRP processes.