How To Fix MR001 - Enter either a material or a material group

SAP Error Message - Details

• Message type: E = Error

• Message class: MR - Stock overview for generic materials

• Message number: 001

• Message text: Enter either a material or a material group

What causes this issue?

You have either not entered a material group or a material, or you have
entered both a material group and a material.

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?

Enter either an individual material, a range of materials, or a
material group.
If the material selection results in a list of materials, the total
stocks are first displayed for all of the materials in the list. You
can then branch to the actual stock overview for a particular material.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message MR001 - Enter either a material or a material group ?

  The SAP error message MR001 ("Enter either a material or a material group") typically occurs in the context of materials management, particularly when trying to create or process a document that requires a material or material group to be specified. This error indicates that the system expects you to provide either a specific material number or a material group, but neither has been entered.
  Cause:
  
  Missing Input: The most common cause is that the user has not entered a material number or a material group in the relevant field.
  Incorrect Field: The user may be in the wrong field or transaction where the system expects a different type of input.
  Configuration Issues: There may be configuration settings in the system that require certain fields to be filled out, and these settings may not be aligned with the user's input.
  Authorization Issues: In some cases, the user may not have the necessary authorizations to view or enter materials or material groups.
  
  Solution:
  
  Enter Material or Material Group: Ensure that you enter either a valid material number or a material group in the appropriate field. Check for typos or incorrect entries.
  Check Transaction: Verify that you are in the correct transaction and that the fields you are filling out are appropriate for the action you are trying to perform.
  Review Configuration: If you have access, check the configuration settings related to materials management to ensure that the system is set up correctly.
  Consult Documentation: Refer to SAP documentation or help files for the specific transaction you are using to understand the required fields.
  Contact Support: If the issue persists, consider reaching out to your SAP support team or system administrator for assistance. They can help diagnose any underlying issues or configuration problems.
  
  Related Information:
  
  Transaction Codes: This error can occur in various transactions related to purchasing, inventory management, or material master data, such as ME21N (Create Purchase Order), ME51N (Create Purchase Requisition), or others.
  Material Master: Ensure that the material master data is correctly set up and that the materials you are trying to use are active and not blocked.
  User Authorizations: Check if the user has the necessary authorizations to access and enter materials or material groups.
  
  By following these steps, you should be able to resolve the MR001 error and proceed with your SAP tasks.