How To Fix CNV20600008 - For table &1 control table CNVSTEPS was modified (performance optimiz.)

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV20600 - message class for package 20600

• Message number: 008

• Message text: For table &1 control table CNVSTEPS was modified (performance optimiz.)

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNV20600008 - For table &1 control table CNVSTEPS was modified (performance optimiz.) ?

  The SAP error message CNV20600008 indicates that the control table CNVSTEPS has been modified, which is typically related to performance optimization during a data migration or conversion process. This message is part of the SAP Conversion and Migration tools, often used in projects involving data transfer from legacy systems to SAP systems.
  Cause:
  The error occurs when the control table CNVSTEPS, which is used to manage the steps in the conversion process, has been altered in a way that is not compatible with the expected structure or data integrity required by the migration program. This could happen due to:
  
  Manual Changes: Someone may have manually modified the CNVSTEPS table, which can lead to inconsistencies.
  Custom Development: Custom programs or enhancements that interact with the CNVSTEPS table may have inadvertently changed its structure or data.
  Version Mismatch: If there are different versions of the migration tools or if the system has been upgraded, it may lead to discrepancies in the expected data format.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check for Modifications: Review the CNVSTEPS table to identify any unauthorized or unintended changes. You can use transaction SE11 to view the table structure and data.
  
  
  Restore Original Structure: If modifications were made, restore the CNVSTEPS table to its original structure. This may involve reverting to a backup or reapplying the standard SAP structure.
  
  
  Review Custom Code: If there are custom developments that interact with the CNVSTEPS table, review the code to ensure it does not alter the table inappropriately.
  
  
  Consult Documentation: Check the SAP documentation related to the specific migration tool you are using. There may be notes or guidelines on how to handle the CNVSTEPS table.
  
  
  Run Consistency Checks: Use transaction codes like SE38 to run any available consistency checks or reports that can help identify issues with the migration setup.
  
  
  Contact SAP Support: If the issue persists, consider reaching out to SAP support for assistance. They may provide patches or additional guidance based on the specific context of your system.
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SE11 (Data Dictionary), SE38 (ABAP Editor), and ST22 (Dump Analysis) for troubleshooting.
  SAP Notes: Search for SAP Notes related to the CNVSTEPS table and the specific migration tool you are using. SAP Notes often contain important information about known issues and their resolutions.
  Migration Tools: Understand the specific migration tool you are using (e.g., SAP S/4HANA Migration Cockpit, SAP Data Services) and its requirements regarding the CNVSTEPS table.
  
  By following these steps, you should be able to identify the cause of the error and implement a solution to resolve it.