2.5 Question regarding multiple newsservers

I use multiple newsservers, and recently the first preferred 
newsserver dropped some groups.

Now when these groups are harvested, ubh fails on nntp->group on the 
first newsserver, and never tries the second newsserver for the same 
group.

How can I tell ubh to continue to the next newsserver if the first 
does not have the group?



 
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