How To Fix MD421 - &1: &2 &3 (U3)

MD421 - Overview

• Message type: E = Error

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

• Message number: 421

• Message text: &1: &2 &3 (U3)

What causes this issue?

There is no requirements for this receipt. It should be reversed to
avoid unnecessary warehouse stock.

System Response

This exception is displayed in the MRP list, and in the
stock/requirements list.

How to fix this error?

Check whether the receipt can be reversed.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message MD421 - &1: &2 &3 (U3) ?

  The SAP error message MD421 typically relates to issues in the Material Requirements Planning (MRP) process, specifically when there are problems with the availability of materials or the planning of production orders. The message format you provided indicates that it is a warning or error related to the MRP run.
  
  Cause:
  The error message MD421 usually indicates that there is a problem with the availability of materials for a specific production order or planned order. The placeholders &1, &2, and &3 in the message represent specific details about the error, such as:
  
  &1: The material number
  &2: The plant or location
  &3: Additional information or context about the error
  
  Common causes for this error include:
  
  Insufficient stock of the material.
  Incorrect planning parameters.
  Issues with the bill of materials (BOM) or routing.
  MRP settings that do not align with the production requirements.
  
  
  Solution:
  To resolve the MD421 error, you can take the following steps:
  
  
  Check Material Availability: Verify the stock levels of the