r.line stops partway through

[Simon Cox]

>
>
> Who has used r.line to do raster -> vector conversion?
> I am trying to use it on a scanned contour separation.
> I am finding that it is working fine, but seems to stop
> part way down my data - ie I get ok results down to a
> certain row, and then nothing lower.  During running I get
> a load of lines saying things like ...
>
>

Sorry folks - this seemed to get garbled -
the lines say things like