How To Fix CNV751 - Memory parameters for index & for table & could not be set

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV - Conversion: Messages for Conversion Services (CNCC)

• Message number: 751

• Message text: Memory parameters for index & for table & could not be set

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNV751 - Memory parameters for index & for table & could not be set ?

  The SAP error message "CNV751 Memory parameters for index & for table & could not be set" typically occurs during data migration or conversion processes, particularly when using the SAP S/4HANA Migration Cockpit or other data migration tools. This error indicates that the system is unable to allocate the necessary memory parameters for a specific index or table during the execution of a conversion program.
  Causes:
  
  Insufficient Memory Allocation: The system may not have enough memory allocated for the operation, which can happen if the default memory settings are too low for the data being processed.
  Database Configuration: The database settings may not be optimized for the operations being performed, leading to memory allocation issues.
  Large Data Volume: If the data volume being processed is significantly large, it may exceed the memory limits set in the system.
  Incorrect Configuration: There may be incorrect or missing configuration settings in the SAP system that affect memory management.
  
  Solutions:
  
  
  Increase Memory Parameters:
  
  Adjust the memory parameters in the SAP system. You can do this by modifying the instance profile parameters such as abap/heap_area_dia, abap/heap_area_nondia, and abap/heap_area_total.
  Use transaction RZ10 to change the profile parameters and then restart the instance for the changes to take effect.
  
  
  
  Check Database Settings:
  
  Review and optimize the database settings. Ensure that the database has sufficient memory allocated and that the configuration is appropriate for the workload.
  
  
  
  Monitor System Resources:
  
  Use transaction ST02 (Tune Summary) to monitor memory usage and identify any bottlenecks. This can help you understand if the system is running out of memory during the operation.
  
  
  
  Batch Processing:
  
  If possible, consider processing the data in smaller batches to reduce the memory load during the migration process.
  
  
  
  Consult SAP Notes:
  
  Check for any relevant SAP Notes that may address this specific error. SAP frequently releases updates and patches that can resolve known issues.
  
  
  
  System Upgrade:
  
  If you are running an older version of SAP, consider upgrading to a more recent version that may have improved memory management capabilities.
  
  
  
  Related Information:
  
  
  Transaction Codes: 
  
  RZ10 for changing instance profile parameters.
  ST02 for monitoring memory usage.
  SM37 for checking job logs related to the migration process.
  
  
  
  SAP Notes: Search for specific SAP Notes related to the CNV751 error message in the SAP Support Portal. These notes may provide additional insights or patches.
  
  
  Documentation: Review the official SAP documentation for the migration tool you are using, as it may contain specific recommendations for memory settings and configurations.
  
  
  If the issue persists after trying the above solutions, it may be beneficial to engage with SAP support for further assistance.