v.overlay.and gets "stuck"

[kiarasky]

Hi all! It's Kiara. I am using a script to overlay two shapefiles, respectively line and polygon type. The overlay operation gets stuck at approximately 74%, and it happens in the script, by command line and also by using the grass toolbox in qgis. maybe the problem is the number of vertices? More info: (ALL_ROUTES_M1SO6 is the line map, prova_conc_grand_grass is a test polygon i'm using)

GRASS 6.4.2 (Europe):~/Desktop/short-term/grass_CODE_NewData > v.overlay ainput=ALL_ROUTES_M1SO6@PERMANENT atype=line alayer=1 binput=prova_conc_grand_grass@PERMANENT btype=area blayer=1 output=routes_overlapped_test2 operator=and 
Copying vector objects from vector map <ALL_ROUTES_M1SO6@PERMANENT>...
 100%
Collecting input attributes...
Copying vector objects from vector map
<prova_conc_grand_grass@PERMANENT>...
 100%
Collecting input attributes...
Building partial topology...
Building topology for vector map <routes_overlapped_test2>...
Registering primitives...
869 primitives registered
20203 vertices registered
Number of nodes: 138
Number of primitives: 869
Number of points: 0
Number of lines: 868
Number of boundaries: 1
Number of centroids: 0
Number of areas: -
Number of isles: -
Breaking lines...
^C74%

* here I stopped the procedure, and after that I cannot open the map that has been created. My maximum wall time has been 20 minutes...is that normal?

thanks a lot Kiara