How To Fix MR004 - No plant class type has been maintained for the stock overview

SAP Error Message - Details

• Message type: E = Error

• Message class: MR - Stock overview for generic materials

• Message number: 004

• Message text: No plant class type has been maintained for the stock overview

What causes this issue?

When the system tried to determine the class type which was used to
group plants for the stock overview, it did not find any assignment
entry for application class <LS>04</> (stock overview).

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?

Inform your system administrator so that the correct setting can be
made in Customizing.
Procedure for system administrator
Make the following assignments in Customizing under
<DS:SIMG.W_GE_0200.SIMG_ORAL>applications</>:
Assign class type <LS>035</> to application class <LS>04</> (standard
system).

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message MR004 - No plant class type has been maintained for the stock overview ?

  The SAP error message MR004, which states "No plant class type has been maintained for the stock overview," typically occurs when there is a configuration issue related to the plant class types in the system. This error is often encountered in the context of inventory management and stock overview transactions.
  Cause:
  The primary cause of this error is that the system is unable to find a valid plant class type for the specified plant in the stock overview. This can happen due to:
  
  Missing Configuration: The plant class type has not been defined in the system for the specific plant.
  Incorrect Plant Assignment: The plant may not be correctly assigned to a class type in the configuration settings.
  Data Inconsistency: There may be inconsistencies in the master data or configuration settings that lead to this error.
  
  Solution:
  To resolve the MR004 error, you can follow these steps:
  
  
  Check Plant Configuration:
  
  Go to the SAP Customizing Implementation Guide (SPRO).
  Navigate to Logistics > Materials Management > Inventory Management > Environment > Define Plant Class Types.
  Ensure that the relevant plant class type is defined for the plant in question.
  
  
  
  Maintain Plant Class Type:
  
  If the plant class type is missing, you will need to create or maintain it.
  Assign the appropriate class type to the plant.
  
  
  
  Verify Master Data:
  
  Check the material master data for the affected materials to ensure that they are correctly assigned to the plant.
  Use transaction code MM03 to view the material master data and verify the plant settings.
  
  
  
  Check User Authorizations:
  
  Ensure that the user has the necessary authorizations to view stock information for the specified plant.
  
  
  
  Consult Documentation:
  
  Review any relevant SAP documentation or notes related to the error for additional troubleshooting steps.
  
  
  
  Contact SAP Support:
  
  If the issue persists after checking the configuration and master data, consider reaching out to SAP support for further assistance.
  
  
  
  Related Information:
  
  Transaction Codes: You may use transaction codes like MMBE (Stock Overview) to reproduce the error and check the stock status.
  SAP Notes: Look for SAP Notes related to MR004 for any known issues or patches that may address the problem.
  User Forums: Check SAP community forums or other user groups for similar issues and solutions shared by other users.
  
  By following these steps, you should be able to identify and resolve the cause of the MR004 error in SAP.