How To Fix RS_PSA_DEP020 - Table &1 cannot be converted because it is of DB type &2.

SAP Error Message - Details

• Message type: E = Error

• Message class: RS_PSA_DEP -

• Message number: 020

• Message text: Table &1 cannot be converted because it is of DB type &2.

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message RS_PSA_DEP020 - Table &1 cannot be converted because it is of DB type &2. ?

  The SAP error message RS_PSA_DEP020 indicates that there is an issue with the conversion of a table in the context of the SAP Data Warehousing environment, specifically related to the Persistent Staging Area (PSA). The error message typically arises when there is a mismatch between the expected database type of a field and the actual database type of that field in the source table.
  Cause:
  
  Data Type Mismatch: The error occurs when the system attempts to convert a field from one database type to another, but the source field's data type is not compatible with the expected type. For example, if the system expects a character type but encounters a numeric type, this error may be triggered.
  Database Structure Changes: If there have been changes to the underlying database structure (e.g., changes in data types or field lengths) that are not reflected in the Data Warehouse or the InfoSource, this can lead to conversion issues.
  Incorrect Data Source Configuration: The configuration of the data source may not match the actual structure of the source table, leading to discrepancies in data types.
  
  Solution:
  
  Check Data Source Configuration: Verify the configuration of the data source in the SAP BW system. Ensure that the data types defined in the InfoSource match the actual data types in the source table.
  Adjust Data Types: If there is a mismatch, you may need to adjust the data types in the InfoSource or the underlying database table to ensure compatibility.
  Update Data Model: If there have been changes to the database structure, update the data model in SAP BW to reflect these changes. This may involve regenerating the data source or InfoSource.
  Data Transfer Process (DTP) Settings: Review the settings of the Data Transfer Process to ensure that they are correctly configured to handle the data types being transferred.
  Check for Data Quality Issues: Sometimes, the data itself may contain unexpected values that do not conform to the expected data types. Perform data quality checks on the source data to identify and rectify any anomalies.
  
  Related Information:
  
  Transaction Codes: You may use transaction codes like RSA1 (Data Warehousing Workbench) to check the InfoObjects and InfoSources.
  SAP Notes: Check for relevant SAP Notes that may address specific issues related to this error message. SAP Notes often provide patches or workarounds for known issues.
  Logs and Traces: Review the logs and traces for more detailed error messages that can provide additional context about the issue.
  Documentation: Refer to SAP documentation for guidelines on data modeling and data type handling in SAP BW.
  
  By following these steps, you should be able to identify the root cause of the RS_PSA_DEP020 error and implement a solution to resolve it.