# Problem instantiating Virtual Machines

**URL:** <https://forum.opennebula.io/t/problem-instantiating-virtual-machines/2337>\
**Category:** Product Support\
**Created:** [June 5, 2016, 2:53pm UTC](https://forum.opennebula.io/t/problem-instantiating-virtual-machines/2337 "2016-06-05T14:53:01Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![ruben](https://yyz1.discourse-cdn.com/flex031/user_avatar/forum.opennebula.io/ruben/32/19_2.png) [@ruben](https://forum.opennebula.io/u/ruben)\
**Post date:** [June 6, 2016, 8:23am UTC](https://forum.opennebula.io/t/problem-instantiating-virtual-machines/2337/2 "2016-06-06T08:23:17Z")

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Hi

Probably you need to:

1.- Set OS = [ ARCH = “…” attribute  
2.- Set OS = [ Machine = “…” attribute  
3.- Update the emulator PATH #EMULATOR = /usr/libexec/qemu-kvm (probably to  
the arm version)

All of this can be done by default for all your VMs in  
/etc/one/vmm\_exec/vmm\_exec\_kvm.conf.

You can get all the information from the output of virsh capabilities.

There is no native support for the DTB file, but you can also add it  
through a RAW attribute:

RAW=[TYPE=“kvm”, DATA="/path/to/dtb/in\_the\_nodes]

Note that in this case OpenNebula will not transfer the files. Also you can  
set a deafult for all your VMs in the previous file.

Hope it helps

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