How To Fix MU079 - You can create or change only one BOM per transaction

SAP Error Message - Details

• Message type: E = Error

• Message class: MU - Maintenance of structured materials

• Message number: 079

• Message text: You can create or change only one BOM per transaction

What causes this issue?

You have already created a bill of material for empties (empties BOM)
for the unit of measure &V1&, or changed the corresponding empties BOM.
You cannot create or change an empties BOM for another unit of measure
in the same transaction because only one empties BOM can be processed
per transaction.

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?

If you want to create or change an empties BOM for another
unit of measure, save your data for the existing empties BOM and access
the transaction <LS>Change Material</> again. You can then switch to
component maintenance and choose the unit of measure required.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message MU079 - You can create or change only one BOM per transaction ?

  The SAP error message MU079, which states "You can create or change only one BOM per transaction," typically occurs when you attempt to create or modify multiple Bill of Materials (BOMs) in a single transaction. This restriction is in place to ensure data integrity and to prevent potential issues that could arise from processing multiple BOMs simultaneously.
  Cause:
  
  Multiple BOMs in One Transaction: The most common cause of this error is that the user is trying to create or change more than one BOM at a time in a single transaction.
  Batch Processing: If you are using a batch input session or a program that attempts to process multiple BOMs in one go, this error can occur.
  User Interface Limitations: Some SAP transactions or screens may not support the creation or modification of multiple BOMs at once.
  
  Solution:
  
  Single BOM Processing: Ensure that you are only creating or changing one BOM at a time. If you need to create or change multiple BOMs, do so in separate transactions.
  Check Batch Input Sessions: If you are using batch input sessions, review the session to ensure that it is not attempting to process multiple BOMs simultaneously.
  Use Appropriate Transactions: Make sure you are using the correct transaction codes for BOM creation or modification (e.g., CS01 for creating a BOM, CS02 for changing a BOM).
  Error Handling in Custom Programs: If you are using custom programs or scripts, implement error handling to ensure that only one BOM is processed per transaction.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with the relevant transaction codes for BOM management:
  
  CS01: Create BOM
  CS02: Change BOM
  CS03: Display BOM
  
  
  SAP Notes: Check for any SAP Notes related to BOM processing that may provide additional insights or updates regarding this error.
  Documentation: Review SAP documentation or help files for more information on BOM management and the limitations of the system.
  
  By following these guidelines, you should be able to resolve the MU079 error and successfully manage your BOMs in SAP.