How To Fix RD177 - Error when reading from DataSource &1

SAP Error Message - Details

• Message type: E = Error

• Message class: RD - CO-PA Connection to SAP BW

• Message number: 177

• Message text: Error when reading from DataSource &1

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 RD177 - Error when reading from DataSource &1 ?

  The SAP error message RD177, which states "Error when reading from DataSource &1," typically occurs during the extraction process when the system encounters issues while trying to read data from a specified DataSource. Here’s a breakdown of the potential causes, solutions, and related information for this error:
  Causes:
  
  DataSource Configuration Issues: The DataSource may not be properly configured or activated in the SAP system.
  Authorization Problems: The user executing the extraction may not have the necessary authorizations to access the DataSource.
  DataSource Not Available: The DataSource might be inactive or not available in the system.
  Technical Issues: There could be underlying technical issues such as connectivity problems, system performance issues, or database errors.
  Data Extraction Logic: There may be issues with the logic defined in the DataSource, such as incorrect filters or joins that lead to no data being returned.
  Transport Issues: If the DataSource was recently transported from another system, it may not have been properly activated or configured in the target system.
  
  Solutions:
  
  Check DataSource Activation: Ensure that the DataSource is activated in the SAP system. You can do this by navigating to the DataSource in the Data Warehousing Workbench (transaction code RSA1) and checking its status.
  Review Authorizations: Verify that the user has the necessary authorizations to access the DataSource. This can be done by checking the user roles and authorizations in transaction code SU53 or SU01.
  Test DataSource: Use transaction code RSA3 to test the DataSource directly. This will help you determine if the DataSource is returning data as expected.
  Check for Technical Issues: Look into system logs (transaction code SM21) and short dumps (transaction code ST22) for any related errors that might provide more context on the issue.
  Review Data Extraction Logic: If applicable, review the extraction logic defined in the DataSource to ensure it is correctly set up and that there are no filters or conditions that would prevent data from being returned.
  Re-transport DataSource: If the DataSource was recently transported, consider re-transporting it or checking the transport logs for any issues during the transport process.
  
  Related Information:
  
  Transaction Codes:
  
  RSA1: Data Warehousing Workbench
  RSA3: Test DataSource
  SU53: Authorization Check
  SM21: System Log
  ST22: Dump Analysis
  
  
  SAP Notes: Check SAP Notes related to RD177 for any specific patches or updates that may address known issues.
  Documentation: Review SAP documentation for DataSource configuration and troubleshooting for more detailed guidance.
  
  If the issue persists after trying the above solutions, it may be beneficial to consult with your SAP Basis or BW team for further investigation.