Hi Brian,
I am using Heron to export some curves(polylines) however i ran into this weird bug.
I have an ordered curve(polylines) list and when i try to export them i ran into this error. *image below
However for some reason if i flatten the list it exports and I can see all the curves in QGIS.*Image below
But I need the curves to be ordered. Do you know an easy way to tackle this issue?
Thanks a lot for your help!
Yattra
Hi again @Brian_Washburn
I have internalised and reduced the amount in the original list however even with this i encounter the same issue
Heron_Error.gh (52.9 KB)
Another finding that I have is when I change the ‘Vector Data Filename’ input to not start with a number it exports some geometry but not all of them. And the grouping/tree branches is still not being attached to curves in the shp file export. 
Hi @Yattra_Batsaa ,
I named the file “test” and it seemed to work. Make sure to remove any empty or null values from the input list of geometry and try grafting them.
-Brian
