How To Fix /SAPAPO/SNP_LLC020 - Cycle in supply network at transportation lane &1 -> &2

SAP Error Message - Details

• Message type: E = Error

• Message class: /SAPAPO/SNP_LLC -

• Message number: 020

• Message text: Cycle in supply network at transportation lane &1 -> &2

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /SAPAPO/SNP_LLC020 - Cycle in supply network at transportation lane &1 -> &2 ?

  The SAP error message /SAPAPO/SNP_LLC020 indicates that there is a cycle in the supply network at a specific transportation lane between two locations (denoted as &1 and &2). This error typically arises in the context of Supply Network Planning (SNP) within SAP Advanced Planning and Optimization (APO).
  Cause:
  The cycle in the supply network can occur due to several reasons:
  
  Circular Dependencies: There may be a circular dependency in the transportation lanes, where the supply from one location leads back to itself through a series of other locations.
  Incorrect Configuration: The transportation lanes or the supply network may be incorrectly configured, leading to unintended loops.
  Data Integrity Issues: There may be issues with the master data, such as incorrect location or transportation lane definitions.
  
  Solution:
  To resolve the error, you can take the following steps:
  
  
  Analyze the Transportation Lanes:
  
  Check the transportation lanes between the locations mentioned in the error message. Ensure that there are no circular references.
  Use transaction codes like /SAPAPO/TSN1 (Transportation Lane) to review the configuration.
  
  
  
  Review Supply Network Configuration:
  
  Examine the supply network design to identify any unintended cycles. This can be done using the Supply Network Planning (SNP) graphical tools.
  Ensure that the supply network is designed logically without any loops.
  
  
  
  Check Master Data:
  
  Verify the master data for the locations involved. Ensure that the locations are correctly defined and that there are no inconsistencies.
  Check for any changes in the master data that might have introduced the cycle.
  
  
  
  Use the SNP Heuristic:
  
  If applicable, run the SNP heuristic to see if it can identify and resolve the cycle automatically.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or notes related to this error message for any specific recommendations or patches that may address the issue.
  
  
  
  Engage SAP Support:
  
  If the issue persists after checking the above points, consider reaching out to SAP support for further assistance. Provide them with detailed information about the error and the steps you have already taken.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as /SAPAPO/TSN1 for transportation lanes and /SAPAPO/SNP1 for SNP planning.
  SAP Notes: Search for SAP Notes related to this error message in the SAP Support Portal for any known issues or fixes.
  Documentation: Review the SAP APO documentation for best practices in configuring transportation lanes and supply networks.
  
  By following these steps, you should be able to identify and resolve the cycle in the supply network that is causing the error message /SAPAPO/SNP_LLC020.