After upgrading Tableau Server, previously working extracts pointing to DB2 on iSeries using an ODBC Connection, the refresh fails with the error "Check the Data Connection page for necessary updates to an access token or embedded credentials"
Connecting to an IBM DB2 data source on iSeries platform is currently not supported. However, you may have some success connecting to this data source on the ISeries platform using the following suggestions:
|Root Cause||Connecting to IBM DB3 is not supported on iSeries platforms. Functionality may not persist after upgrading|
For more information about the capabilities and limitations of connecting to unsupported data sources using the generic ODBC connections, see Tableau and ODBC and Customizing and Tuning ODBC Connections