Can't use an undefined value as a HASH reference at /usr/local/www/cgi-bin/kapc/md2/display_md_calendar.cgi line 1528. $user_id == 0 ref($user_id) == $temp2 == 27 ref($temp2) == $temp3 == 27 ref($temp3) == $ref == HASH(0x8390bf0) ref($ref) == HASH $ref->{'employee_id'} == 27 $ref->{'type'} == Routine --- $i == 0 $today_int == 1041483600 $no_call_requested_days == HASH(0x837ded0) \$no_call_requested_days->{$today_int} == ARRAY(0x8390c38) scalar(@{$no_call_requested_days->{$today_int}}) == 2 @{$no_call_requested_days->{$today_int}}[$i] == HASH(0x8390bf0) ${@{$no_call_requested_days->{$today_int}}[$i]}->{employee_id} == 27 %{@{$no_call_requested_days->{$today_int}}[$i]}->{type} == Routine ---