How To Fix DDU121 - >>>Check and write active table sources

SAP Error Message - Details

• Message type: E = Error

• Message class: DDU - Dictionary Tools 5.0

• Message number: 121

• Message text: >>>Check and write active table sources

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message DDU121 - >>>Check and write active table sources ?

  The SAP error message DDU121, which states "Check and write active table sources," typically relates to issues with the data sources in the SAP system, particularly in the context of data extraction or data transfer processes. This error can occur in various scenarios, such as during the extraction of data from a source system to a target system, or when there are inconsistencies in the data source definitions.
  Causes:
  
  Inconsistent Data Sources: The active table sources may not be properly defined or may have inconsistencies that prevent the system from processing them correctly.
  Missing or Incorrect Configuration: The configuration for the data source may be incomplete or incorrect, leading to issues when the system attempts to access or write data.
  Transport Issues: If the data source definitions were transported from one system to another, there may be issues with the transport that need to be resolved.
  Authorization Issues: Lack of proper authorizations for accessing the data sources can also lead to this error.
  Data Source Activation: The data source may not be activated properly in the system.
  
  Solutions:
  
  Check Data Source Configuration: Go to the Data Source configuration in the SAP system and verify that all settings are correct. Ensure that the data source is properly defined and activated.
  Re-activate Data Sources: If the data source is not active, try reactivating it. This can often resolve issues related to inconsistencies.
  Check for Transport Issues: If the data source was recently transported, check the transport logs for any errors or warnings that may indicate issues with the transport.
  Review Authorizations: Ensure that the user has the necessary authorizations to access the data sources. You may need to consult with your SAP security team to verify this.
  Check Active Table Sources: Use transaction codes like RSA1 (Data Warehousing Workbench) to check the active table sources and ensure they are correctly set up.
  Consult SAP Notes: Look for relevant SAP Notes that may address this specific error. SAP frequently releases notes that provide fixes or workarounds for known issues.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with transaction codes such as RSA1 (Data Warehousing Workbench), RSO2 (Data Source Maintenance), and RSO3 (Data Source Overview) to manage and troubleshoot data sources.
  SAP Documentation: Refer to the official SAP documentation for detailed information on data sources and their configuration.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they have found.
  
  If the problem persists after trying the above solutions, it may be beneficial to consult with your SAP Basis or technical team for further investigation.