How To Fix UPO_MIG159 - No Field Master Maintained for the Fields.

SAP Error Message - Details

• Message type: E = Error

• Message class: UPO_MIG - Message Class for PRA->UOM Migration

• Message number: 159

• Message text: No Field Master Maintained for the Fields.

Self-Explanatory Message

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To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message UPO_MIG159 - No Field Master Maintained for the Fields. ?

  The SAP error message UPO_MIG159 indicates that there is no field master maintained for the fields that are required in a specific context, typically during a migration or data transfer process. This error often arises in the context of SAP's data migration tools, such as the Migration Cockpit or when using the LSMW (Legacy System Migration Workbench).
  Cause:
  
  
  Missing Field Master Data: The error usually occurs when the system expects certain field master data to be defined, but it is not available in the system. This could be due to:
  
  The field not being created or configured in the system.
  The field being incorrectly defined or not activated.
  The migration template or data structure not matching the expected configuration in the target system.
  
  
  
  Incorrect Mapping: If the mapping of fields from the source to the target system is incorrect or incomplete, it can lead to this error.
  
  
  Configuration Issues: There may be configuration issues in the relevant modules or components that are supposed to handle the data being migrated.
  
  
  Solution:
  
  
  Check Field Master Data: 
  
  Verify that the required field master data is created and maintained in the system. This can be done by checking the relevant configuration settings in the SAP system.
  Ensure that the fields are active and properly defined in the system.
  
  
  
  Review Migration Template:
  
  Check the migration template or data structure you are using to ensure that it aligns with the expected fields in the target system.
  Make sure that all required fields are included in the migration template.
  
  
  
  Mapping Verification:
  
  Review the mapping of fields from the source to the target system. Ensure that all fields are correctly mapped and that there are no missing fields.
  
  
  
  Consult Documentation:
  
  Refer to the SAP documentation related to the specific migration process you are using. This may provide insights into required configurations and common pitfalls.
  
  
  
  Testing:
  
  Conduct tests with a smaller dataset to identify if the issue persists. This can help isolate the problem and determine if it is related to specific records or fields.
  
  
  
  Seek Support:
  
  If the issue persists after checking the above points, consider reaching out to SAP support or consulting with an SAP expert who can provide more tailored assistance based on your specific system configuration and migration scenario.
  
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional guidance on field master maintenance.
  Migration Cockpit Documentation: Review the official SAP documentation for the Migration Cockpit or the specific migration tool you are using for best practices and troubleshooting tips.
  Community Forums: Engage with SAP community forums or user groups where similar issues may have been discussed, and solutions shared.
  
  By following these steps, you should be able to identify the cause of the UPO_MIG159 error and implement a solution to resolve it.