Issue: Changing connections from one System to another.
Possible Error message : failed to instantiate data source
Test case Example: You would like to change connections from a previously created Design Studio Application. Your connection was pointing to SAP BW Development and you would like to change the connection to a SAP BW Quality Assurance system.
Steps to resolve:
1) Open Design Studio
2) Click on the previously created (I will open Test 4, screenshot above)
Cancel log in prompts if necessary
3) Once opened, click on Data Sources (Circled in red in Screenshot below)
4) Click and expand on Data binding (Circled in red, Screenshot below)
5) Click on the square box (Circled in red and Arrow, Screenshot below)
Hope this helps.