How To Fix TG640 - *** RDDMVNTB: generating substitution nametabs (DDYTT, DDYTF)

SAP Error Message - Details

• Message type: E = Error

• Message class: TG - Messages for Upgrade Repository Switch

• Message number: 640

• Message text: *** RDDMVNTB: generating substitution nametabs (DDYTT, DDYTF)

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message TG640 - *** RDDMVNTB: generating substitution nametabs (DDYTT, DDYTF) ?

  The SAP error message TG640, specifically related to the RDDMVNTB program, indicates an issue with generating substitution name tables (nametabs) for the specified data dictionary objects (in this case, DDYTT and DDYTF). This error typically arises during the generation of name tables for database tables or views in the SAP system.
  Cause:
  
  Missing or Incomplete Data Dictionary Objects: The data dictionary objects (DDYTT, DDYTF) may not be fully defined or may be missing required components.
  Transport Issues: If the objects were recently transported from another system, there may have been issues during the transport process that left the objects in an inconsistent state.
  Authorization Issues: The user executing the program may not have the necessary authorizations to access or modify the data dictionary objects.
  System Configuration Issues: There may be configuration issues within the SAP system that prevent the generation of the name tables.
  
  Solution:
  
  Check Data Dictionary Objects: Verify that the data dictionary objects (DDYTT, DDYTF) are correctly defined. You can do this by using transaction SE11 (Data Dictionary) to check the definitions and attributes of these objects.
  Rebuild Name Tables: You can try to regenerate the name tables by executing the program RDDMVNTB manually. This can be done in transaction SE38 or SA38. Make sure to provide the correct parameters.
  Check Transport Logs: If the objects were recently transported, check the transport logs for any errors or warnings that may indicate issues during the transport process.
  Authorization Check: Ensure that the user has the necessary authorizations to access and modify the data dictionary objects. You may need to consult with your SAP security team.
  System Consistency Check: Run consistency checks on the data dictionary using transaction SE14 (Database Utility) to ensure that there are no inconsistencies in the database objects.
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error message or provide additional troubleshooting steps.
  
  Related Information:
  
  Transaction Codes: SE11 (Data Dictionary), SE14 (Database Utility), SE38/SA38 (ABAP Program Execution).
  SAP Notes: Always check for relevant SAP Notes that may provide fixes or additional information regarding this error.
  Documentation: Review SAP documentation related to data dictionary management and name table generation for further insights.
  
  If the issue persists after trying the above solutions, it may be necessary to engage SAP support for more in-depth troubleshooting.