Convert boundary of a hatch to curves

I have a 3dm full of hatches created elsewhere. I need to get the boundary curves of those hatches. SelCrv does not show boundaries. Ideas please…

TIA
Robb

Not in front of my Rhino now, but I thought DupBorder now works on hatches…?
Edit: confirmed…

Thanks,

I discovered DupEdge doesn’t work. Never saw DupBorder before. So many commands and so much to do.

Robb