Hi Michael,

I can understand why the ordering objects may not be preserved after joining and then separating. But in the instance of the node files attached to last email:
a lofted surface Loft/Style: Straight when separated breaks into an array of surfaces
that are indexed sequentially in rows as would be expected.

However applying an Offset to the lofted surface, prior to separating, will result in a disordered indexing of objects.

>>One thing that might work for you though is to track things by setting object names on sub-objects.<<

I can see how it might be possible automatically generate names for each new object after separation and catalogue them in order. Then if they become disordered by the application of joining & separating or offsetting, the original index could be reinstated as per object catalogue.

Anyway, thank you for responding to my query.

All the best with your work on V4. You seem to be edging ever closer

Regards James