How To Fix MD420 - &1: &2 &3 (U2)

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 420

• Message text: &1: &2 &3 (U2)

What causes this issue?

In the rescheduling check, the system calculated a date to which the
receipt is to be moved out (rescheduled out) to avoid high warehouse
stock at the wrong time.
The date displayed is the date by which the receipt is to be available
for MRP. This includes the goods receipt processing time. If this is not
zero, this is displayed as well as the required goods receipt date.

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 postponed.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message MD420 - &1: &2 &3 (U2) ?

  The SAP error message MD420 typically relates to issues in the Material Requirements Planning (MRP) process, specifically when there are problems with the planning of materials. The message format you provided indicates that it includes placeholders for specific details, which can vary based on the context of the error.
  Cause:
  The error message MD420 usually indicates that there is a problem with the planning run, such as:
  
  Missing Master Data: The material master data or BOM (Bill of Materials) might be incomplete or missing.
  Incorrect MRP Parameters: The MRP parameters for the material might not be set correctly.
  Stock Issues: There may be issues with stock levels, such as negative stock or stock not being available for the planned order.
  Planning File Entries: There could be issues with the planning file entries that prevent the MRP run from processing correctly.
  Configuration Issues: There may be configuration issues in the MRP settings that need to be addressed.
  
  Solution:
  To resolve the MD420 error, you can take the following steps:
  
  
  Check Material Master Data: Ensure that the material master data is complete and correctly configured. This includes checking the MRP views and ensuring that all necessary fields are filled out.
  
  
  Review BOM and Routing: If applicable, check the BOM and routing for the material to ensure they are correctly defined and available.
  
  
  Verify MRP Parameters: Check the MRP parameters for the material in the material master to ensure they are set correctly for your planning needs.
  
  
  Check Stock Levels: Review the stock levels for the material to ensure that there are no discrepancies, such as negative stock.
  
  
  Analyze Planning File Entries: Use transaction code MD21 to check the planning file entries for the material and ensure they are correct.
  
  
  Run MRP Again: After making the necessary corrections, run the MRP process again 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.
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as MD01 (MRP Run), MD02 (Single-item, Multi-level MRP), and MD21 (Display Planning File Entries).
  MRP Configuration: Understanding MRP configuration settings in SPRO can help in diagnosing issues related to planning.
  SAP Community: Engaging with the SAP Community can provide 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 technical consultant who can provide more in-depth analysis and assistance.