How To Fix MG801 - Customer structure & for main data does not exist

SAP Error Message - Details

• Message type: E = Error

• Message class: MG - Batch input: material master

• Message number: 801

• Message text: Customer structure & for main data does not exist

What causes this issue?

You have set the indicator "Different main data structure". In this
case, structure ZMMH1 will be used to transfer the main material data,
not structure BMMH1. Structure BMMH1 must be present and active in the
Repository.
If you want to use the standard structure BMMH1 to transfer the main
data, do not set the indicator "Different main data structure".

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message MG801 - Customer structure & for main data does not exist ?

  The SAP error message MG801, which states "Customer structure & for main data does not exist," typically occurs in the context of Material Management (MM) or Sales and Distribution (SD) modules when the system is unable to find the necessary customer master data for a specific transaction or process.
  Cause:
  
  
  Missing Customer Master Data: The most common cause of this error is that the customer master data for the specified customer does not exist in the system. This could be due to the customer not being created or not being properly maintained.
  
  
  Incorrect Customer Number: The customer number being referenced may be incorrect or may not correspond to an existing customer in the system.
  
  
  Data Inconsistency: There may be inconsistencies in the data, such as missing entries in the relevant tables that link customers to materials or sales documents.
  
  
  Configuration Issues: There may be configuration issues in the system that prevent the customer data from being accessed correctly.
  
  
  Solution:
  
  
  Check Customer Master Data:
  
  Go to transaction code XD03 (Display Customer) or VD03 (Display Customer - Sales Area) and check if the customer exists.
  If the customer does not exist, create it using transaction code XD01 (Create Customer) or VD01 (Create Customer - Sales Area).
  
  
  
  Verify Customer Number:
  
  Ensure that the customer number being used in the transaction is correct. Double-check for any typographical errors.
  
  
  
  Check Data Consistency:
  
  Use transaction code SE11 to check the relevant database tables (like KNA1 for general customer data) to ensure that the data is consistent and complete.
  
  
  
  Review Configuration:
  
  If you suspect a configuration issue, consult with your SAP Basis or configuration team to ensure that the necessary settings for customer data are correctly configured.
  
  
  
  Check Authorization:
  
  Ensure that the user has the necessary authorizations to access customer data. Lack of authorization can sometimes lead to similar error messages.
  
  
  
  Consult SAP Notes:
  
  Check the SAP Support Portal for any relevant SAP Notes that might address this specific error message or provide additional troubleshooting steps.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as XD01, XD03, VD01, VD03, and SE11.
  SAP Documentation: Review SAP documentation related to customer master data management for more insights on how to manage and troubleshoot customer data issues.
  Support Community: Engage with the SAP Community or forums for additional support and shared experiences from other users who may have encountered similar issues.
  
  By following these steps, you should be able to identify the cause of the MG801 error and implement the appropriate solution.