How To Fix RSTRAN870 - Empty comparison table

SAP Error Message - Details

• Message type: E = Error

• Message class: RSTRAN - Messages for Transformation

• Message number: 870

• Message text: Empty comparison table

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 RSTRAN870 - Empty comparison table ?

  The SAP error message RSTRAN870, which states "Empty comparison table," typically occurs in the context of data transfer processes, particularly when working with SAP BW (Business Warehouse) or SAP BI (Business Intelligence). This error indicates that the system is trying to perform a comparison operation, but the comparison table that is supposed to hold the data is empty.
  Causes:
  
  Missing Data: The comparison table may not have been populated with data due to issues in the data extraction or loading process.
  Incorrect Data Source: The data source from which the comparison table is supposed to pull data may not be correctly configured or may not contain any data.
  Transformation Issues: There may be issues in the transformation logic that prevent data from being transferred to the comparison table.
  Data Selection Criteria: The selection criteria used in the data transfer process may be too restrictive, resulting in no data being selected for the comparison.
  
  Solutions:
  
  Check Data Source: Verify that the data source is correctly configured and contains the expected data. You can do this by running a query or report on the data source.
  Review Data Load Process: Check the data load process to ensure that data is being extracted and loaded correctly into the comparison table. Look for any errors or warnings in the data load logs.
  Examine Transformation Logic: Review the transformation rules to ensure that they are correctly set up to populate the comparison table. Make sure that the mappings and logic are correct.
  Adjust Selection Criteria: If the selection criteria are too restrictive, consider modifying them to allow for a broader range of data to be included in the comparison.
  Run Data Transfer Again: After making any necessary adjustments, run the data transfer process again to see if the comparison table is populated correctly.
  
  Related Information:
  
  Transaction Codes: You may want to use transaction codes like RSA1 (Data Warehousing Workbench) to monitor and manage data flows and transformations.
  Logs and Monitoring: Check the logs for the data load process in the SAP BW system to identify any specific errors or warnings that may provide more context for the issue.
  SAP Notes: Look for relevant SAP Notes in the SAP Support Portal that may address this specific error or provide additional troubleshooting steps.
  Documentation: Review SAP documentation related to data transfer processes, transformations, and data sources for best practices and troubleshooting tips.
  
  By following these steps, you should be able to identify the root cause of the RSTRAN870 error and implement a solution to resolve it.