Grep wants an array for its second argument. Dereference your AoHref: 
my $newAoH = [grep { !($_->{'name'} eq "fred") } @$AoHref];

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Update: I was too hasty and only fixed the dereference problem. Obviously, to create a new AoH, you have to actually create the reference. So I've put the brackets on the expression.
Caution: Contents may have been coded under pressure.

In reply to Re: Grep and AoH references by Roy Johnson
in thread Grep and AoH references by bradcathey

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