Sounds fairly straightforward.
Can't call next_hit on an undefined value, so therefore $result is currently undefined.

You set $result just above that line using:
my $result=$in->next_result;

So, the logical reason would be that next_result is returning undef. Perhaps because there are no further results to return.
You should check return values for error values before using them.

In reply to Re: I don't understand error message by SuicideJunkie
in thread I don't understand error message by lomSpace

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