I have created a linked custom transformer with a loop and a spatial filter. In this transformer I check if a line feature intersects with an area, but only if they belongs to the same group. So I thought I had to use the Group By parameter in the spatial filter.

The problem is that my custom transformer does not work with the Group By parameter. I mean, if I do not define a Group By some lines pass the test (but not belongs to the same group) but if a define the Group no line passes.

This is my first custom transformer, so, any suggestions would be appreciate

Thanks in advance

Víctor