How To Fix CNVMBTPLK004 - Insert of new or changed key into internal table ended with error

SAP Error Message - Details

• Message type: E = Error

• Message class: CNVMBTPLK - SAP LT production lock

• Message number: 004

• Message text: Insert of new or changed key into internal table ended with error

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNVMBTPLK004 - Insert of new or changed key into internal table ended with error ?

  The SAP error message CNVMBTPLK004 typically occurs during data migration or conversion processes, particularly when using the SAP Migration Cockpit or similar tools. This error indicates that there was an issue with inserting a new or changed key into an internal table, which can be caused by various factors.
  Causes:
  
  Duplicate Keys: The most common cause is that the key being inserted already exists in the internal table, leading to a violation of unique constraints.
  Data Type Mismatch: There may be a mismatch between the data types of the key being inserted and the expected data types in the internal table.
  Null or Invalid Values: Attempting to insert null or invalid values into fields that do not allow them can also trigger this error.
  Memory Issues: If the internal table is too large or if there are memory constraints, it may lead to errors during insertion.
  Incorrect Configuration: Misconfiguration in the migration settings or mapping can lead to issues when trying to insert data.
  
  Solutions:
  
  Check for Duplicates: Review the data being inserted to ensure that there are no duplicate keys. You can do this by querying the internal table before the insertion.
  Validate Data Types: Ensure that the data types of the keys being inserted match the expected data types in the internal table.
  Handle Null Values: Make sure that you are not trying to insert null or invalid values into fields that require valid data.
  Increase Memory Allocation: If memory issues are suspected, consider increasing the memory allocation for the process or optimizing the internal table size.
  Review Configuration: Double-check the migration configuration and mapping settings to ensure they are set up correctly.
  Debugging: If the issue persists, consider debugging the process to identify the exact point of failure and the data causing the issue.
  
  Related Information:
  
  Transaction Codes: You may want to check transaction codes like SE11 (Data Dictionary) to inspect the structure of the internal table and SE80 (Object Navigator) for related programs.
  SAP Notes: Look for relevant SAP Notes that may address this specific error or provide patches and updates.
  Logs and Traces: Review application logs (transaction SLG1) and traces to gather more context about the error.
  SAP Community: Engaging with the SAP Community or forums can provide insights from other users who may have encountered similar issues.
  
  If the problem persists after trying the above solutions, it may be beneficial to reach out to SAP support for further assistance.