[GRASS-user] Problems with v.to.db after breaking with v.edit

[Mira Kattwinkel]

Dear list

I break a number of features in a vector map into two pieces using 
v.edit, tool=break and specific coordinates. This results in two parts 
with identical attributes after breaking (which is what I want) but also 
the cat is identical.
I think, this is the reason why I get exactly the same length for the 
two parts when calculating it using v.to.db, tool=length. Likewise, the 
end coordinates cannot be computed as there is more than one element for 
some categories.

How can I update the category to unique values for each feature?

Thanks for any suggestions,
Mira