my $tdate = $fields[0];
  print "$tdate\n";
my $trade_dt=UnixDate($tdate,"%Y-%m-%d");
#  my $trade_dt = DATE(\"$tdate\");
  print "$trade_dt\n";
my $ins_rec = "INSERT IGNORE INTO $tblname(\`trade_dt\`,\`symbol\`) values (?,?);";

my $sth=$dbh->prepare($ins_rec);
$sth->execute($trade_dt,$symbol);
$sth->finish;

##</code><code>##

"10/14/2011"
Use of uninitialized value $trade_dt in concatenation (.) or string at Set.data.pl line 42, <FIN> line 1.