Is there a reason that instead of

my $data= (Dumper $res->valueof('//listPhoneByNameResponse/return/phon
+e'));
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you cannot just use the data structure directly?

my $data= [ $res->valueof('//listPhoneByNameResponse/return/phone') ];
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Why do the round trip through Data::Dumper and eval?

Update: made results into arrayref, as it appears that is the intent of the original code.