Oh yes, I finally found it: the default.ipxe was empty, but it shouldn’t!
Found this in the FOG wiki:
[COLOR=#000000][FONT=monospace]#!ipxe
dhcp || reboot
cpuid --ext 29 && set arch x86_64 || set arch i386
params
param mac ${net0/mac}
param arch ${arch}
chain [url]http://x.x.x.x/fog/service/ipxe/boot.php##params[/url][/FONT][/COLOR]
Now the FOG menu is showing up! 
It’s an empty file. Is this right like that?
See the screenshot:
[ATTACH]1513[/ATTACH]
[url=“/_imported_xf_attachments/1/1513_command.jpg?:”]command.jpg[/url]
Well, it’s not just a console error: the client doesn’t finish booting from the FOG server. The FOG boot menu never shows up. As I wrote, I already checked the forum but didn’t find a suitable solution. I also checked the wiki.
I’m booting my Client via PXE. Then my WDS-Server is redirecting to the FOG-Server (using pxechn.c32). From here on, have a look at my screenshot:
[ATTACH]1509[/ATTACH]
See also the attached log files.
[url=“/_imported_xf_attachments/1/1509_screenshot.jpg?:”]screenshot.jpg[/url][url=“/_imported_xf_attachments/1/1510_error.txt?:”]error.txt[/url][url=“/_imported_xf_attachments/1/1511_foginstall.txt?:”]foginstall.txt[/url][url=“/_imported_xf_attachments/1/1512_error1.txt?:”]error1.txt[/url]
Hey guys,
at the moment I’m trying to get FOG running, because we’d like to use it to deploy images. After setting up a Main-Server, 3 Storage-Nodes and doing some configuration, I now tried to boot a Client via PXE. This step failed and I have no idea how to fix it: “Could not boot: Exec format error”.
My configuration:
What I’ve tried:
I hope, anybody has any idea and can help me. Thank you in advance!
Enexor