$InsertIntoMetar = <<SQL;
REPLACE INTO Metar 
SELECT
	*,NULL
FROM 
	Deduped_Metars_No_Errors a;
SQL

..............

$sth  = $dbh->prepare($InsertIntoMetar)
	or die "Can't prepare $InsertIntoMetar: $dbh->errstr\n";
	$rv   = $sth->execute															##Insert into production Metar table.
	or die "can't execute the query: $sth->errstr";

##</code><code>##

can't execute the query: DBI:: st=HASH(0x1a07924)-> errstr at Load_Metar_New1.pl line 600. Line 600 is the line that contains the $rv   = $sth->execute shown above.