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

MR001 - Overview

• 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