booting from iso not working cdrom not found

I installed mondo on a fresh naked Debian 9 stretch to test Mondo.

mindi_3.0.2-1
mindi-busybox_1.21.1-1
mondo_3.2.2-1

Then i successfully built mondorescue-1.iso with mondoarchive.
The rebuild with mondorescue from terminal is working, but when i transfer the ISO to a bootable usb-stick the startprocess brake.

error on booting with "interactive usb=/dev/sdb" :
-------------------------------------------------
Mounting USB device (/dev/sdb1) on /mnt/cdrom........(sdb1): IO charset ascii not found
mount: wrong fs type, bad option, bad superblock on /dev/sdb1,
       missing codepage or helper program, or other error
installing additional tools ...
Can´t find CD´s /mnt/cdrom/images/all.tar.gz
tar: can´t open '/mnt/cdrom/images/all.tar.gz': No such file or directory
-------------------------------------------------
error on booting only with "interactive" :
Activating a potential USB Storage device
............Unable to find and mount your CD-ROM
You probably miss the correct driver to support your CD-ROM drive
First call to find-and-mount-cdrom failed.
...
Installing additional tools ...
tar: can´t open '/mnt/cdrom/images/all.tar.gz': No such file or directory
...
I don´t know where the CDROM lives. Optimization cancelled.
-------------------------------------------------

When i made a virtualbox and start the ISO everything boots fine...whats my problem?

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