Illegal instruction

Hi guys, I'm following the tutorial called:
ZedBoard: Zynq-7000 AP SoC Concepts, Tools, and Techniques

A Hands-On Guide to Effective Embedded System Design
ZedBoard (Vivado 2014.2)
 
In point: 5.3 Hello World example
I followed all the intructions and when I executed the generated elf, this is what I get:
zynq> /mnt/Hello_World_ap.elf

Illegal instruction

zynq>

Can anyone help me? I've followed all the steps.

Thanks