Can anyone explain why I am recieving this error.
Use of uninitialized value in concatenation (.) or string at Signup.pl line 46.
Use of uninitialized value in string eq at Signup.pl line 52.
Use of uninitialized value in concatenation (.) or string at Signup.pl line 53.
Use of uninitialized value in concatenation (.) or string at Signup.pl line 60.

#Selecting parents name to identify as volunteer.
   if ($parent eq "Father")
   {
        $sub_parent = "Mother";
        $sth = $dbh->prepare ("select Father from Roster where User = 
+\'$user\'");
        $sth->execute ();

$name = $sth->fetchrow_array;
   } #end if Father
   else
   {
        $sub_parent = "Father";
        $sth = $dbh->prepare ("select Mother from Roster where User = 
+\'$user\'");
        $sth->execute ();

$name = $sth->fetchrow_array;
   } #end else Mother

if ($name eq ""){
        $sth = $dbh->prepare ("select $sub_parent from Roster where Us
+er = \'$user\'");
        $sth->execute ();

$name = $sth->fetchrow_array;

} #end chk for not parent if statement.

print $query->h1({-align=>'center'},"THANK YOU FOR SIGNING UP $name");

foreach $date ( @volunteer_date ) {

        $sth = $dbh->prepare ("select distinct Volunteer from Voluntee
+r
                                where Volunteer = \'$name\'
                                and Date = \'$date\'");
        $sth->execute ();

my $chk = $sth->fetchrow_array;

    if ($chk eq $name){
        print $query->h1({-align=>'center'}, "You are already signed u
+p for this date: $date");
        } #end if statement
   else{
   $sth = $dbh->prepare ("select max(Number) from Volunteer
                                        where Date = '$date'
                                          and Volunteer = 'TBD'");
   $sth->execute ();
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