How To Fix MR055 - The unit of measure entered is not allowed for the material

SAP Error Message - Details

• Message type: E = Error

• Message class: MR - Stock overview for generic materials

• Message number: 055

• Message text: The unit of measure entered is not allowed for the material

What causes this issue?

You have chosen a unit of measure that is not allowed for the material
specified.

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?

Choose a valid unit of measure. You can check the units of measure that
have been defined for the material by choosing <LS>Extras</> ->
<LS>Units of measure</>.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message MR055 - The unit of measure entered is not allowed for the material ?

  The SAP error message MR055 ("The unit of measure entered is not allowed for the material") typically occurs when there is a mismatch between the unit of measure (UoM) being used in a transaction and the units defined for the material in the system. Here’s a breakdown of the cause, potential solutions, and related information:
  Cause:
  
  Incorrect Unit of Measure: The unit of measure you are trying to use for the material is not defined in the material master data.
  Material Master Configuration: The material may have specific units of measure defined in the material master that do not include the one you are trying to use.
  Transaction Type: The transaction you are performing may not support the unit of measure you are trying to use.
  Unit of Measure Conversion: If there are conversion factors defined, they may not be set up correctly, leading to the error.
  
  Solution:
  
  
  Check Material Master Data:
  
  Go to the material master record (transaction code MM03).
  Check the "Basic Data" and "Purchasing" views to see the allowed units of measure for the material.
  Ensure that the unit of measure you are trying to use is listed there.
  
  
  
  Update Material Master:
  
  If the required unit of measure is not present, you may need to add it. This can be done using transaction code MM02 to change the material master data.
  Ensure that the new unit of measure is correctly defined and that any necessary conversion factors are set up.
  
  
  
  Review Transaction Settings:
  
  Ensure that the transaction you are performing (e.g., purchase order, goods receipt) is compatible with the unit of measure you are trying to use.
  
  
  
  Check for User Exits or Custom Code:
  
  If there are any user exits or custom code that might be affecting the unit of measure validation, review them to ensure they are not causing the issue.
  
  
  
  Consult Documentation:
  
  Review SAP documentation or help files related to unit of measure settings for further guidance.
  
  
  
  Related Information:
  
  Unit of Measure Types: Understand the different types of units of measure (base unit, alternative unit, etc.) and how they are used in SAP.
  Configuration Settings: Familiarize yourself with the configuration settings for units of measure in the SAP IMG (Implementation Guide) under Logistics General > Material Master > Basic Settings > Define Units of Measure.
  SAP Notes: Check for any relevant SAP Notes that might address specific issues or bugs related to unit of measure handling.
  
  By following these steps, you should be able to resolve the MR055 error and ensure that the correct unit of measure is being used for the material in question.