How To Fix RSDF020 - No valid connection

SAP Error Message - Details

• Message type: E = Error

• Message class: RSDF - Messages: Data Flow Object

• Message number: 020

• Message text: No valid connection

What causes this issue?

Target objects and source objects are an invalid combination for a
connection in the data flow. You cannot create a valid transformation or
a data transfer process. The source object is not a valid subobject of
the target object.

System Response

The connection is not created.

How to fix this error?

Create a connection between two objects that result in a valid
source-target combination.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message RSDF020 - No valid connection ?

  The SAP error message RSDF020, which states "No valid connection," typically occurs in the context of SAP Data Warehousing or when working with SAP BW (Business Warehouse) and its data extraction processes. This error indicates that there is an issue with the connection to the source system or the data source from which data is being extracted.
  Causes of RSDF020 Error
  
  
  Connection Configuration Issues: The connection to the source system may not be properly configured. This could be due to incorrect settings in the RFC (Remote Function Call) destination or the data source configuration.
  
  
  Network Issues: There may be network connectivity problems between the SAP BW system and the source system, preventing a successful connection.
  
  
  Authorization Problems: The user credentials used for the connection may not have the necessary authorizations to access the source system.
  
  
  Source System Down: The source system might be down or not reachable at the time of the data extraction.
  
  
  Transport Layer Issues: If the connection is set up in a transport layer, there may be issues with the transport configuration.
  
  
  Solutions to RSDF020 Error
  
  
  Check RFC Destination:
  
  Go to transaction code SM59 in SAP.
  Verify the configuration of the RFC destination used for the connection. Ensure that the connection type is correct and that the target system is reachable.
  
  
  
  Test Connection:
  
  In the SM59 transaction, use the "Test Connection" button to check if the connection to the source system is working properly.
  
  
  
  Review Authorizations:
  
  Ensure that the user ID used for the connection has the necessary authorizations to access the source system and perform the required operations.
  
  
  
  Check Network Connectivity:
  
  Verify that there are no network issues preventing access to the source system. This may involve checking firewalls, VPNs, or other network configurations.
  
  
  
  Source System Status:
  
  Confirm that the source system is up and running. If it is down, you will need to wait until it is back online.
  
  
  
  Review Logs:
  
  Check the system logs for any additional error messages or information that could provide more context about the issue.
  
  
  
  Reconfigure Data Source:
  
  If the data source configuration is incorrect, you may need to reconfigure it in the SAP BW system.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or support notes related to the specific version of SAP BW you are using for any known issues or additional troubleshooting steps.
  
  
  
  Related Information
  
  
  Transaction Codes: 
  
  SM59 (RFC Destinations)
  RSA1 (Data Warehousing Workbench)
  RSC1 (DataSource Maintenance)
  
  
  
  SAP Notes: 
  
  Check SAP Notes for any specific fixes or patches related to the RSDF020 error.
  
  
  
  SAP Community: 
  
  Engage with the SAP Community forums for insights from other users who may have encountered similar issues.
  
  
  
  By following these steps, you should be able to diagnose and resolve the RSDF020 error in your SAP environment.