How To Fix /LTB/MC154 - Object cannot be used (no source structure assigned); check trans. LTMOM

SAP Error Message - Details

• Message type: E = Error

• Message class: /LTB/MC -

• Message number: 154

• Message text: Object cannot be used (no source structure assigned); check trans. LTMOM

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /LTB/MC154 - Object cannot be used (no source structure assigned); check trans. LTMOM ?

  The SAP error message /LTB/MC154 Object cannot be used (no source structure assigned); check trans. LTMOM typically occurs in the context of SAP's Logistics Execution (LE) or when working with the LTMOM (Legacy Transfer Modeler) transaction. This error indicates that a specific object (like a data structure or a mapping) is not usable because it does not have a source structure assigned to it.
  Cause:
  
  Missing Source Structure: The primary cause of this error is that the object you are trying to use does not have a source structure assigned. This can happen if the object was created without properly linking it to a source structure.
  Configuration Issues: There may be issues in the configuration of the data transfer model or the mapping of the data structures.
  Transport Issues: If the object was transported from another system, it might not have been transported correctly, leading to missing assignments.
  
  Solution:
  
  
  Check LTMOM Configuration:
  
  Go to transaction LTMOM.
  Locate the object that is causing the error.
  Ensure that a source structure is assigned to the object. If not, you will need to assign the appropriate source structure.
  If you are unsure which source structure to assign, consult your data model or the relevant documentation.
  
  
  
  Create or Modify Source Structure:
  
  If the required source structure does not exist, you may need to create it.
  If it exists but is not linked, you can modify the object to link it to the correct source structure.
  
  
  
  Check Transport Requests:
  
  If the object was transported, check the transport request to ensure that all necessary components were included and correctly imported into the target system.
  
  
  
  Consult Documentation:
  
  Review any relevant SAP documentation or notes related to the specific object or data transfer model you are working with.
  
  
  
  Testing:
  
  After making the necessary changes, test the object again to ensure that the error is resolved.
  
  
  
  Related Information:
  
  Transaction LTMOM: This transaction is used for managing the data transfer model in SAP, allowing users to define and modify the mapping of data structures.
  SAP Notes: Check for any SAP Notes related to this error message, as they may provide additional insights or solutions.
  SAP Community: Engaging with the SAP Community can also provide insights from other users who may have encountered similar issues.
  
  If the problem persists after following these steps, it may be beneficial to consult with your SAP Basis or technical team for further investigation.