You could take a copy of the %SYSTEM.OBJ.ValidateIndices code and refactor it to only record the Index name.

You can find the code in the %SYS Namespace in the %SYSTEM.OBJ Class.

You could take a copy of the %SYSTEM.OBJ.ValidateIndices code and create your own version that only writes out the Index name?

You can find the code in the %SYS Namespace.