Found it!
When extracting the kernel file from ftf you get three files 0 (kernel), 1 (ramdisk) and 2 (dtb!). With the dtb included in the boot.img it's possible to run "fastboot boot boot.img" without errors. Only the recovery left
When extracting the kernel file from ftf you get three files 0 (kernel), 1 (ramdisk) and 2 (dtb!). With the dtb included in the boot.img it's possible to run "fastboot boot boot.img" without errors. Only the recovery left