[GRASS-user] v.net.iso - node costs

[Paolo Craveri]

Hi  all

how can I use v.net.iso with node costs ?

I tried this:

g.copy vect=roads,myroads,archsites,myarchsites --o

v.net myroads points=myarchsites out=mynetwork op=connect thresh=1000 --o


v.db.addtable mynetwork layer=2 col="cat integer, cost double precision"

echo "update mynetwork_2 set cost=1" | db.execute

v.net.iso in=mynetwork out=isocost alayer=1 nlayer=2 ncolumn=cost
ccats=1-10 cost=200,600,800,1200,5000 --o

and I get this  error:

ERROR: Vect_read_line(): feature id -384 is not reasonable (max features in

       vector map <mynetwork at user1>: 900)


No error I found if I omit ncolumn option (calculus without node costs).

Thank you,

Paolo