Export ESXi VM using ovftool in Linux

Hello,

I am trying to use the ovftool in Linux to export a VM running on ESXi 4.0 to an OVF package with the following syntax:

$ovftool "vi://root@192.168.X.XXX?ds=[datastore1]test-vm/test-vm.vmx" /home/ovfs/test1.ovf

But I always get the error: Datacenter object not found

The path to the vmx file is:

test-vm/test-vm.vmx

If I have a standalone ESXi (no vCenter present) what Datacenter name should I use?, I have tried with "Datacenter", "Default" but nothing seems to work.

Any help is highly appreciated.

Thanks.

Juan Aristizabal.