How To Fix RSDF_GENERATOR021 - DataSource &1(&2) &3 not allowed. Choose a different name

SAP Error Message - Details

• Message type: E = Error

• Message class: RSDF_GENERATOR - Messages for Data Flow Wizard

• Message number: 021

• Message text: DataSource &1(&2) &3 not allowed. Choose a different name

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message RSDF_GENERATOR021 - DataSource &1(&2) &3 not allowed. Choose a different name ?

  The SAP error message RSDF_GENERATOR021 indicates that there is an issue with the naming of a DataSource in the SAP system. Specifically, the message states that the DataSource you are trying to create or modify is not allowed due to its name. This typically occurs when the name of the DataSource conflicts with existing naming conventions or reserved names in the system.
  Cause:
  
  Naming Conflicts: The DataSource name you are trying to use may already exist in the system or may be reserved for system use.
  Invalid Characters: The name may contain invalid characters or may not conform to the naming conventions set by SAP.
  Namespace Issues: If you are using a custom namespace, ensure that it is correctly defined and that you are following the naming rules for that namespace.
  
  Solution:
  
  Choose a Different Name: The simplest solution is to select a different name for your DataSource that does not conflict with existing names or reserved names.
  Check Existing DataSources: Use transaction codes like RSA1 (Data Warehousing Workbench) or RSD1 (DataSource Maintenance) to check for existing DataSources and ensure that the name you want to use is not already taken.
  Review Naming Conventions: Ensure that the name adheres to SAP's naming conventions, which typically include:
  
  Starting with a letter.
  Containing only alphanumeric characters and underscores.
  Not exceeding the maximum length (usually 30 characters).
  
  
  Namespace Configuration: If you are using a custom namespace, verify that it is correctly configured in the system and that you are following the rules for that namespace.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as RSA1, RSD1, and SE11 (Data Dictionary) for managing DataSources and checking existing objects.
  SAP Notes: Check SAP Notes for any specific issues related to DataSource naming conventions or known bugs that might be causing this error.
  Documentation: Refer to SAP documentation on DataSource creation and naming conventions for more detailed guidelines.
  
  By following these steps, you should be able to resolve the RSDF_GENERATOR021 error and successfully create or modify your DataSource.