Vcenter converter error "Host key can't be retrieved."

Hello friends, how are you?

I'm trying to convert a physical machine with Redhat 3 have the latest version of VMware vCenter Converter (5.5.3)

On the machine with Redhat I have the firewall disabled, the IP as the name resolves well and are within the same network as the host.

At one point, after partition and format the disk on the target server, I get the following error in the log:

FAILED: On a general system error occurred:

Network error. Host 192.168.0.142 key can not be retrieved. (return code 2)

Can someone help me?

Thanks a lot!