How To Fix MH255 - Double placement: material &, layout mod. &, shelf section &, sh. space &

SAP Error Message - Details

• Message type: E = Error

• Message class: MH - Maintain Material Master Data (Retail)

• Message number: 255

• Message text: Double placement: material &, layout mod. &, shelf section &, sh. space &

What causes this issue?

You have entered an assignment of a material and of a unit of measure
to a layout module. This assignment positions the material on a shelf
space that is already occupied by another material or by the same
material in a different unit of measure.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Compare the entries in layout module, version, variant, shelf section,
and sort sequence number with other existing entries that are identical
in these fields, but that differ in material and/or unit of measure.
You will find at least one other entry. To ensure unique shelf section
placements, change the duplicate data in at least one of these fields,
or delete the entry.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message MH255 - Double placement: material &, layout mod. &, shelf section &, sh. space & ?

  The SAP error message MH255 "Double placement: material &, layout mod. &, shelf section &, sh. space &" typically occurs in the context of warehouse management and inventory management within SAP. This error indicates that there is an attempt to place the same material in the same storage location or shelf space where it is already stored, which is not allowed due to the configuration of the warehouse management system.
  Cause:
  
  Duplicate Storage Assignment: The same material is already assigned to the specified layout, shelf section, and storage space.
  Warehouse Configuration: The warehouse management system may be configured to prevent multiple placements of the same material in the same storage area.
  Data Entry Error: There may be an error in the data entry process, leading to an attempt to place the same material in the same location.
  
  Solution:
  
  Check Existing Stock: Verify if the material is already present in the specified layout, shelf section, and storage space. You can do this by checking the stock overview in the SAP system.
  Change Storage Location: If the material needs to be placed again, consider using a different storage location or shelf space that is not currently occupied by the same material.
  Adjust Warehouse Configuration: If the business process allows for multiple placements of the same material in the same location, you may need to adjust the warehouse management configuration. This should be done in consultation with your SAP warehouse management team or system administrator.
  Review Material Master Data: Ensure that the material master data is correctly set up and that there are no conflicting settings that could lead to this error.
  Consult Documentation: Refer to SAP documentation or help resources for more detailed information on warehouse management processes and error handling.
  
  Related Information:
  
  Transaction Codes: You may use transaction codes like LX02 (Display Stock Overview) or LT03 (Create Transfer Order) to manage and view stock placements.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  User Training: Ensure that users involved in warehouse operations are trained on proper procedures for placing materials to avoid such errors.
  
  If the issue 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.