Problem with v.in.arc

[Susan Benjamin]

My colleague, Cindy Bell, is having a problem running v.in.arc.
She goes through the procedure in ARC/INFO to create the lines_in,
points_in, and text_in files then she fires up v.in.arc, puts in 
proper file names and parameter values and it blows up  with:
   "could not locate the arc lines file"
She's tried putting the lines_in file in different places thinking
that the path name was causing the problem, but always with the
same result.
If anyone can shed light on how to fix this, we'd appreciate it.
You can reply here or to Cindy directly (cindy at geo.arc.nasa.gov).
Thanks in advance!
Susan Benjamin
USGS NMD