Hi Michael,
It looks like your application uses a custom tree view control that is mapped to the standard Windows tree view control (that is, added to Tools | Current Project Properties | Object Mapping | Win32 Controls and Windows | Tree view) in one TestComplete project, but not in another. To resolve the issue, add the control's class name to Object Mapping in the second project as well.
You can also add your control's class name to default Object Mapping in Tools > Default Project Properties > Object Mapping so that it is automatically added to all new test projects you create.
