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1515    $ref = @{$no_call_requested_days->{$today_int}}[$i];
1516    $temp2 = $ref->{'employee_id'};
...
1528    if ($temp3 eq $user_id) # $temp3 = ref->{'employee_id'}
1529    {
1530        ...

Can't use an undefined value as a HASH reference at /usr/local/www/cgi
+-bin/kapc/md2/display_md_calendar.cgi line 1528.
$user_id == 0
...
${@{$no_call_requested_days->{$today_int}}[$i]}->{employee_id} == 27
%{@{$no_call_requested_days->{$today_int}}[$i]}->{type} == Routine
---