How To Fix MU126 - Category of logistical material &1 is missing.

SAP Error Message - Details

• Message type: E = Error

• Message class: MU - Maintenance of structured materials

• Message number: 126

• Message text: Category of logistical material &1 is missing.

What causes this issue?

You want to create or change material &V1&. You have maintained a value
for field <LS>Material Number of a Sales Material</> but the no value
for the <LS>Category of a Logistical Material </>field. The system has
identified that the material should be used in the context of logistical
materials either as a sales material or a procurement material.

System Response

To keep the material data consistent, the system prevents you from
saving this material because the <LS>Category of a Logistical Material
</> must be specified.

How to fix this error?

Please check whether you intended to create a procurement material or a
sales material to be used in the context of logistical materials.
If you did not intend to create a sales material or procurement
material, leave the fields <LS>Material Number of a Sales Material</>
and <LS>Category of a Logistical Material</> empty.
If you intended to create a procurement material<(>,<)> make sure that
the field <LS>Category of a Logistical Material</> contains value <ZH>P
</>.
If you intended to create a sales material<(>,<)> make sure that the
field <LS>Category of a Logistical Material</> contains value <ZH>S</>.

Procedure for System Administrators

Please check the content of MARA table fields SALES_MATERIAL and
LOGISTICAL_MAT_CATEGORY.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message MU126 - Category of logistical material &1 is missing. ?

  The SAP error message MU126, which states "Category of logistical material &1 is missing," typically occurs in the context of material management and logistics within the SAP system. This error indicates that the system is unable to find a required category for the specified material, which can hinder processes such as inventory management, procurement, or production planning.
  Cause:
  
  Missing Configuration: The logistical category for the material may not have been defined in the system. This could happen if the material master data was not set up correctly.
  Incorrect Material Type: The material type assigned to the material may not be compatible with the logistical category required for the operations being performed.
  Data Inconsistency: There may be inconsistencies in the material master data, such as missing entries in the relevant tables.
  Authorization Issues: Sometimes, the user may not have the necessary authorizations to view or modify the logistical category.
  
  Solution:
  
  
  Check Material Master Data:
  
  Go to the material master record (transaction code MM03).
  Verify that the logistical category is correctly assigned to the material in the relevant views (e.g., Basic Data, Purchasing, Sales, etc.).
  If the category is missing, you may need to create or update the material master data (transaction code MM01 or MM02).
  
  
  
  Review Material Type Configuration:
  
  Check the configuration of the material type in the Customizing settings (transaction code SPRO).
  Ensure that the material type is correctly set up to include the necessary logistical categories.
  
  
  
  Check for Data Consistency:
  
  Use transaction codes like MM02 to update the material master or MM17 for mass changes to ensure that all required fields are populated correctly.
  You can also run reports or use transaction SE16 to check the relevant database tables for inconsistencies.
  
  
  
  Authorization Check:
  
  Ensure that the user has the necessary authorizations to access and modify the material master data.
  Consult with your SAP security team if you suspect authorization issues.
  
  
  
  Consult Documentation:
  
  Review SAP documentation or help files related to material management and logistical categories for additional guidance.
  
  
  
  Related Information:
  
  Transaction Codes: 
  
  MM01 - Create Material
  MM02 - Change Material
  MM03 - Display Material
  SPRO - Customizing Implementation Guide
  SE16 - Data Browser
  
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  User Forums: Consider visiting SAP community forums or support sites for additional insights from other users who may have encountered similar issues.
  
  By following these steps, you should be able to identify the cause of the MU126 error and implement the necessary solutions to resolve it.