I hve tried using the "Import Machine" option from vCenter (4.1) and get the error below. I have tried it from 3 other computer and get the same error, plus I have tried reinstalled vSphere and the plugins on my PC. It doesn't even work from our vCenter server's vSphere.
The network is fine as vSphere connects to vCenter fine and I can see our 6 hosts and 50 plus servers.
What can I do?
I never used the 4.1 converter plugin, because there's a newer standalone Converter 4.3 available. However, at which point do you get this message? Do you have any firewalls active which might block necessary ports (see http://kb.vmware.com/kb/1010056)?
At which point in the Converter do you get this message? Are you able to pick the target datastore from the drop down list in the Converter wizard? Do all your hosts see the same storage?