How To Fix MD428 - &1: &2 (S9)

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 428

• Message text: &1: &2 (S9)

What causes this issue?

The following reasons exist:
Either a component of the planned order or production order entered is
identical to the material that is to be produced on this basis of this
order, or
the low-level code of the component is smaller than the low-level code
of the material produced.
In the first case, recursiveness occurs, in the second case, it is
possible.

System Response

To avoid an endless loop, the dependent requirement is not taken into
account. The receipt elements that cover this dependent requirement are
therefore also not displayed in the order report.

How to fix this error?

Please check the low-level codes of the materials in question.
&ANNOTATION&
This message is only used in the order report and not in the MRP list
or in the current stock/requirements list.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message MD428 - &1: &2 (S9) ?

  The SAP error message MD428 typically relates to issues in the Material Requirements Planning (MRP) process, specifically concerning the availability of materials or the planning of production orders. The error message format you provided indicates that there are two variables (&1 and &2) that would provide more context about the specific issue.
  Cause:
  
  Material Availability: The error may indicate that the required quantity of a material is not available for the planned production or sales order.
  Planning Parameters: Incorrect planning parameters or settings in the material master data could lead to this error.
  Stock Levels: The stock levels may not meet the requirements due to previous consumption, incorrect stock postings, or unplanned demand.
  MRP Type: The MRP type assigned to the material may not be appropriate for the planning strategy being used.
  
  Solution:
  
  Check Material Availability: Verify the stock levels of the material in question. Use transaction codes like MMBE to check stock status.
  Review MRP Settings: Check the MRP settings in the material master (transaction code MM02) to ensure they are correctly configured.
  Adjust Planning Parameters: If necessary, adjust the planning parameters such as lot size, safety stock, and reorder point.
  Run MRP Again: After making any necessary adjustments, run the MRP process again to see if the error persists.
  Analyze Demand and Supply: Review the demand and supply situation for the material to ensure that all requirements are accounted for.
  Check for Open Purchase Orders: Ensure that there are no open purchase orders that could be affecting the availability of the material.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as MD04 (Stock/Requirements List) and MD01 (MRP Run).
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  Documentation: Review SAP documentation on MRP and material planning for best practices and troubleshooting steps.
  
  If the error persists after following these steps, it may be beneficial to consult with your SAP support team or refer to SAP community forums for additional insights.