High severitydata source
Power BI Refresh Error:
RfcBaseException
What does this error mean?
The SAP .NET Connector threw an RfcBaseException, masking the real SAP BW error. Caused by version conflicts — fix requires a clean GAC reinstall.
Common causes
- 1An old version of the SAP .NET Connector (SAP NCo) is installed — the RfcBaseException.get_ErrorCode() method is missing in older versions
- 2Multiple versions of the SAP .NET connector are installed simultaneously (version conflict)
- 3The SAP .NET connector was installed twice — once in the Global Assembly Cache (GAC) and once not in the GAC
- 4Note: this error hides the real underlying SAP BW error; fixing the connector version reveals the actual problem
How to fix it
- 1Perform a clean installation of the SAP .NET Connector — do not just upgrade over the existing installation
- 2Step 1: Uninstall the existing SAP .NET Connector
- 3Step 2: Verify the connector is gone from the GAC — confirm these paths do NOT contain DLLs: C:\Windows\Microsoft.NET\assembly\GAC_64\sapnco\ and C:\Windows\Microsoft.NET\assembly\GAC_32\sapnco\
- 4Step 3: Confirm no binaries remain in C:\Program Files\SAP\SAP_DotNetConnector3_Net40_x64 or C:\Program Files (x86)\sap\
- 5Step 4: Reinstall the connector (recommended: version 3.0.23) and make sure to check 'Install assemblies to GAC' during setup
- 6After reinstalling, restart the Power BI Desktop or gateway service to load the new connector