Use of uninitialized value $t[6] in string eq at Project1_6.pl line 48, line 2551. Use of uninitialized value $t[6] in string eq at Project1_6.pl line 42, line 2552. #### use Excel::Writer::XLSX; use strict; use warnings; my $rowCount = 0; my $filename = "Output2022.xlsx"; my $workbook = Excel::Writer::XLSX->new( $filename ); open(FH, "<", "SRC185.xlsx" ) or die; my $worksheet = $workbook->add_worksheet('List'); $worksheet->write(0, 0, "source_id" ); $worksheet->write(0, 1, "first_name" ); $worksheet->write(0, 2, "middle" ); $worksheet->write(0, 3, "last_name" ); $worksheet->write(0, 4, "address1" ); $worksheet->write(0, 5, "city"); $worksheet->write(0, 6, "state"); $worksheet->write(0, 7, "postal_code"); $worksheet->write(0, 8, "phone_number"); $worksheet->write(0, 9, "address3"); $worksheet->write(0, 10,"province"); $worksheet->write(0, 11, "email"); my $rowCount1 = 0; my $t=0; my @z = 90005; while (){ chomp; my @t=(',',$_); if(defined($t[8])){ my $Count=0; $worksheet->write($rowCount1+1, $_, $t[$_]); $Count++; } elsif($t[6] eq "CA" && $t[7] eq !defined) { $worksheet->write($rowCount1+1, 7, $z[7]); } $rowCount1++; } $workbook->close(); close(FH);