How To Fix /SAPAPO/RET_MESSAGES151 - The maximum block size must not be one

SAP Error Message - Details

• Message type: E = Error

• Message class: /SAPAPO/RET_MESSAGES -

• Message number: 151

• Message text: The maximum block size must not be one

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /SAPAPO/RET_MESSAGES151 - The maximum block size must not be one ?

  The SAP error message /SAPAPO/RET_MESSAGES151 with the description "The maximum block size must not be one" typically occurs in the context of SAP Advanced Planning and Optimization (APO) when dealing with the configuration of certain planning functions or data processing tasks.
  Cause:
  This error usually arises when the configuration for a planning function or a data processing task has been set incorrectly. Specifically, it indicates that the maximum block size parameter has been set to 1, which is not allowed. The maximum block size is a parameter that defines how many records can be processed in a single block during data processing. A block size of 1 means that only one record would be processed at a time, which is inefficient and not permissible in the system.
  Solution:
  To resolve this error, you need to check and adjust the configuration settings related to the planning function or data processing task that is generating the error. Here are the steps you can take:
  
  
  Access the Planning Function Configuration:
  
  Go to the transaction code /SAPAPO/SDP94 or the relevant transaction for your planning function.
  Locate the planning function that is causing the error.
  
  
  
  Check the Maximum Block Size Setting:
  
  In the configuration of the planning function, look for the parameter related to the maximum block size.
  Ensure that the maximum block size is set to a value greater than 1 (e.g., 10, 100, etc.).
  
  
  
  Save the Changes:
  
  After adjusting the maximum block size, save the changes to the configuration.
  
  
  
  Test the Planning Function:
  
  Rerun the planning function or data processing task to verify that the error has been resolved.
  
  
  
  Related Information:
  
  Documentation: Refer to the SAP Help Portal or the specific documentation for SAP APO for more details on configuring planning functions and understanding the parameters involved.
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide additional guidance on configuration best practices.
  Performance Considerations: When setting the maximum block size, consider the performance implications. A larger block size can improve processing efficiency but may also require more memory and resources.
  
  If the issue persists after making the necessary adjustments, it may be beneficial to consult with your SAP Basis or APO support team for further investigation.