After installing K2 Five (5.2) Fix Pack 15 you are unable to link a SmartObject as a data source to a Tree control in a view/form.
- Ensure you have K2 Five (5.2) installed.
- Download the K2 Five (5.2) FP23 from K2 Partner and Customer Portal.
- Install the K2 Five (5.2) FP23 to apply the fix.
- Refresh the browser cache.
The fix for KB002920 was rolled back to fix this issue. A new fix for KB002920 will be released in a future Fix Pack.