Hi Roland,
if there are too less points for ground classification the file will be copied from source to target.
lasground64 -i cube.laz -o tmp.laz -v
gives as output
LAStools lasground (by
in...@rapidlasso.de) version 240522
WARNING: input has less than 10 points.
copying 'cube.laz' ...
The result file "tmp.laz" contains all points of "cube.laz".
Please describe in detail what did not work and how your log output looks like.
Thanks,
Jochen @rapidlasso