How To Fix /SAPAPO/SNPOPT809 - Starting dual simplex algorithm

SAP Error Message - Details

• Message type: E = Error

• Message class: /SAPAPO/SNPOPT -

• Message number: 809

• Message text: Starting dual simplex algorithm

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

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Smart SAP Assistant

• What is the cause and solution for SAP error message /SAPAPO/SNPOPT809 - Starting dual simplex algorithm ?

  The SAP error message /SAPAPO/SNPOPT809 Starting dual simplex algorithm typically occurs in the context of SAP Advanced Planning and Optimization (APO) when the system is attempting to solve an optimization problem using the dual simplex algorithm. This message is not necessarily an error but rather an informational message indicating that the optimization process is starting.
  Possible Causes:
  
  Optimization Model Complexity: The model being solved may be complex, leading to the need for the dual simplex algorithm.
  Data Issues: There may be issues with the input data, such as missing or incorrect values, which can affect the optimization process.
  Resource Constraints: The model may have constraints that make it necessary to use the dual simplex algorithm to find a feasible solution.
  Solver Configuration: The configuration of the optimization solver may lead to the selection of the dual simplex algorithm.
  
  Solutions:
  
  Check Input Data: Ensure that all input data for the optimization model is complete and correct. Look for missing values or inconsistencies.
  Review Model Constraints: Analyze the constraints defined in the optimization model to ensure they are set up correctly and do not conflict with each other.
  Monitor Performance: If the optimization process takes too long, consider simplifying the model or breaking it down into smaller parts.
  Solver Settings: Review the settings of the optimization solver in SAP APO. You may need to adjust parameters or switch to a different algorithm if necessary.
  Consult Documentation: Refer to SAP documentation or help resources for specific guidance on the dual simplex algorithm and its application in your scenario.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to the dual simplex algorithm or optimization problems in SAP APO.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they found.
  Performance Monitoring: Use transaction codes like /SAPAPO/OPTIMIZE to monitor the performance of optimization runs and gather more insights into the process.
  
  If the message persists or if you encounter further issues, it may be beneficial to reach out to SAP support for more detailed assistance tailored to your specific environment and configuration.