Okay, I took a look and there was a problem if only one NetworkID/SubnetMask combination was provided as the second parameter together with an empty third parameter. I've fixed the issue and the updated UDF is available at http://www.kixtart.org/cgi-bin/ultimatebb.cgi?ubb=get_topic&f=12&t=000053
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There are two types of vessels, submarines and targets.
