ovftool fails with curl error: couldn't connect to server

HI,

I'm trying to create an OVF using ovftool 3.0.1. When I issue the ovftool command from the command line I get:

Error: cURL error: Couldn't connect to server
Completed with errors

I used the following command:

/usr/bin/ovftool vi://username:password@XX.XX.XX.XX/datacenter/vm/folder/vmname /destination

I can issue the command as above without the vmname to see if I can access Vsphere and to make sure I have a valid source locator.  The command is successful and returns a list of VMs I can use. When I add the VM name to the source locator path, I get the above error. The VM is pysically about 14GB in size (that is the space alloacted).

I can use the same command to another Vpshere server and I'm successful in creating the OVF. Which leads me to think that it might be a configuration issue with this Vsphere server?

What sorts of issues can lead to the above error?

Thanks,

Fernando