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

MD431 - Overview

• 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