Rather than burning CDs I had try to test the iso image with the :
knoppix fromhd=/dev/hda1

and i put there the iso file just built.

This does not work. I get :
cannot find a knoppix file system or something like that.

About the 900 Mbytes sized iso image.
the /mnt/hda1/knx/source and master directories are always on my hard drive.
Before building a new image, do not forget to remove the
/mnt/hda1/knx/source/KNOPPIX/KNOPPIX file either the new built master is appended to the old one.

Now the iso file is 450 Mbytes.

This new iso image has been burnt, but it does not work.
May be I had removed too much packages.
I think removing the gtk package is not a good idea.
I had remove nessus. Is it good ?