Dear Monks- I am going crazy trying to figure out what i'm doing wrong (and i'm sure it's something that'll be obvious). I'm getting the "Use of uninitialized value in concatenation (.) or string at ... line 33." message, but it seems to me that everything must be initialized? what am i missing?

(i'm just using line 33 as a debugging line - it's really part of an SQL statment, but since i keep getting this error, although with a prior edit, it wasn't happening, and i'm not sure what i might have inadvertantly added or deleted 

2 use strict;
3 use CGI qw/:standard :html3 :netscape/;
4 use Win32::ODBC;
5 use POSIX qw(strftime);
6
7 my $q = new CGI;
8 my ($mdy, $nomname, $nomemail, $nominst, $submitname, $submitemail, 
+$submitcat, $submitinst, $submitdiv, $mentor, $ptcare, $clinres, $com
+ments);
9
10 my %in = map { $_ => $q->param($_) } $q->param;
11 for (keys %in) {
12    $in{$_} =~ s/'/''/g;
13    print "$_ = $in{$_}</p>";
14 }
15
16 $mdy = strftime "%m/%d/%Y %H:%M:%S",localtime;
17 $nomname = $in{NOMNAME};
18 $nomemail = $in{NOMEMAIL};
19 $nominst = $in{NOMINST};
20 $submitname = $in{SUBMITNAME};
21 $submitemail = $in{SUBMITEMAIL};
22 $submitcat = $in{SUBMITCAT};
23 $submitinst = $in{SUBMITINST};
24 $submitdiv = $in{SUBMITDIV};
25 $mentor = $in{MENTOR};
26 $ptcare = $in{PTCARE};
27 $clinres = $in{CLINRES};
28 $comments = $in{COMMENTS};
.
.
33 print "('$mdy','$nomname','$nomemail','$nominst','$submitname','$su
+bmitemail', '$submitcat','$submitinst','$submitdiv','$mentor','$ptcar
+e','$clinres', '$comments')";

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TIA for pointing out where i'm being stupid (and any other pointers would be greatly appreciated - i'm a part-time/hobbyist perl programmer - wish i had more time to learn perl properly!!).

In reply to help with strict by jck

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