I am unable to see the Change Values button in the search results under Manage Assets - Advanced Search, in Unicenter Asset Portfolio Management 11.3.4.
You can log in to Unicenter Asset Portfolio Management as Administrator to see the functionality.
If you need to create a new role testing will need to be done.
Create a new role with all permissions. You can remove a few permissions at a time and test that the button still exists. This will allow you to see the permission that is causing the problem.