equalize angles in kangaroo

I am trying to understand the equalization of angles aspect of kangaroo. I am not sure why this definition does not work. Any advice is appreciated. 

I have two examples in the definition;

in the first one i have diamonds that I am trying to adjust so that each angle is the same.

in the second simpler example i have two sets of lines that I am trying to equalize the angle of...

I get this error

1. Solution exception:Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index

Thank you! -E