In attached file, every second object goes inactive by an expression on an “active value node” based on the dop name suffix:

opdigits($OBJNAME)%2

This returns zero for all pieces when I change the way I create my objects. Difference being the copy order inside the rbdfractured object. When switching around the sopgeo and copyobject order (see picture) the OBJNAME variable isn't accessible in expressions later in the graph.