[Qgis-user] Problems with Intersection by using Grass's v.overlay

[David Shi]

I encountered following problems with Intersection by using Grass's v.overlay.
I used 2 vector area maps to create a new map through intersection (or option used).
The number of new polygonal areas of the output each time is different.   Inconsistent output.
I kept encountering Error 6:  Failed to add field named 'a_testnumber'.


Can anyone shed some light on this?
Regards,
David
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