I'm away and can't check but just received some advice from support:
In this last case, one possible cause could be related to a corrupted hosts file.
On Macintosh and Linux systems, the file is under the directory:
/etc/hosts Please make sure to map hostnames to valid IP addresses.
The IP address and the username for the local host can be searched using the following instructions:
>> ip = char( getHostAddress(java.net.InetAddress.getLocalHost)) >> user = getenv('UserName')
Please ping the machine name to test.