[GRASS-user] v.patch -a

[Hamish]

Hi,

I am trying to understand 'v.patch -a'.


if I try:

v.patch -a in="map1,map2" out="map1" --overwrite

I get an error:
ERROR: Output vector map <map1> is used as input


The flag description indicates that is ok if --o is used:
Flags:
  -a   Append files to existing file (overwriting existing files must be activated)


??

thanks,
Hamish