Ubuntu an installation step failed local image

Hi guys,
I have an issue wtih ubuntu installation with image through local
repository on my server, i've mount the installation iso and the
destination is correct, for example "
http://my.server/ro/repo/ubuntu/$version/os/$arch" but the error is "an
installation step failed"

see the attachment file

Can you a suggest for me?


predeed produzione.txt (5.9 KB)

preseed default ipxe.txt (819 Bytes)

preseed default pxeLinux.txt (737 Bytes)