Error 13 when try to image C90LEW

Error 13 when try to image C90LEW 

Hi Guys hope you can help,

I have a number of C90LEW clients that im trying to image using WDM (4.8.5).

We have succesfully deployed images to the clients before with any issues, but upon trying now (after getting another 20 delivered) when attempting to deploy the working image the clients now just display the following error:

Booting 'Reinstall OS from network'

Kernel /vmlinuz rw root=/dev/ram ramdisk_size=131072 quiet

Error 13: Invalid or unsupported executable format

Press any key to continue..."

Any ideas what might be causing this? We have not changed anything configuration wise since we deployed the image ok before. I have tried imaging 2 of the clients and this is now appearing on both everytime they are restarted.

Thanks!