--- loncom/homework/grades.pm	2007/10/26 20:18:43	1.469
+++ loncom/homework/grades.pm	2007/10/29 09:46:28	1.470
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # The LON-CAPA Grading handler
 #
-# $Id: grades.pm,v 1.469 2007/10/26 20:18:43 albertel Exp $
+# $Id: grades.pm,v 1.470 2007/10/29 09:46:28 foxr Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -5239,6 +5239,7 @@ sub scan_data {
 
 sub scantron_parse_scanline {
     my ($line,$whichline,$scantron_config,$scan_data,$just_header)=@_;
+
     my %record;
     my $questions=substr($line,$$scantron_config{'Qstart'}-1);  # Answers
     my $data=substr($line,0,$$scantron_config{'Qstart'}-1);     # earlier stuff
@@ -5277,7 +5278,9 @@ sub scantron_parse_scanline {
     my $questnum=0;
     my $ansnum  =1;		# Multiple 'answer lines'/question.
 
-    while ($questions) {
+    chomp($questions);		# Get rid of any trailing \n.
+    $questions =~ s/\r$//;      # Get rid of trailing \r too (MAC or Win uploads).
+    while (length($questions)) {
 	my $answers_needed = $bubble_lines_per_response{$questnum};
 	my $answer_length  = $$scantron_config{'Qlength'} * $answers_needed;
 
@@ -5313,15 +5316,18 @@ sub scantron_parse_scanline {
 	    } elsif (!defined($currentquest)
 		     || (&occurence_count($currentquest, $$scantron_config{'Qoff'}) == length($currentquest))
 		     || (&occurence_count($currentquest, "[A-Z]") == 0)) {
+		&Apache::lonnet::logthis("Missing if, $questnum, $ansnum");
 		for (my $ans = 0; $ans < $answers_needed; $ans++ ) {
 		    $record{"scantron.$ansnum.answer"}='';
 		    $ansnum++;
 
 		}
 		if (!&scan_data($scan_data,"$whichline.no_bubble.$questnum")) {
+		    &Apache::lonnet::logthis("Parsed missing: $questnum");
 		    push(@{$record{"scantron.missingerror"}},$questnum);
-		    $ansnum += $answers_needed;
+		   #  $ansnum += $answers_needed;
 		}
+		&Apache::lonnet::logthis("Residual scanline:  '$questions'");
 
 	    } else {
 		for (my $ans = 0; $ans < $answers_needed; $ans++) {
@@ -6480,7 +6486,9 @@ ENDSCRIPT
 		  join(',',@{$arg}).'" />');
 	foreach my $question (@{$arg}) {
 	    my $selected = &get_response_bubbles($scan_record, $question);
-	    &scantron_bubble_selector($r,$scan_config,$question);
+	    my @select_array = split(/:/,$selected); # ought to be an array of empties.
+	    &Apache::lonnet::logthis("Calling bubble selector (missing)");
+	    &scantron_bubble_selector($r,$scan_config,$question, @select_array);
 	}
     } else {
 	$r->print("\n<ul>");
@@ -6500,7 +6508,7 @@ ENDSCRIPT
     $r           - Apache request object
     $scan_config - hash from &get_scantron_config()
     $quest       - number of the bubble line to make a corrector for
-    $lines       - array of answer lines.
+    @lines       - array of answer lines.
 
 =cut
 
@@ -6521,6 +6529,7 @@ sub scantron_bubble_selector {
 
     my $total_lines = $lines*2;
     my @alphabet=('A'..'Z');
+    &Apache::lonnet::logthis("Putting in question number $quest");
     $r->print("<table border='1'><tr><td rowspan='".$total_lines."'>$quest</td>");
 
     for (my $l = 0; $l < $lines; $l++) {
@@ -6871,8 +6880,12 @@ sub scantron_validate_missingbubbles {
 						 $scan_data);
 	if (!defined($$scan_record{'scantron.missingerror'})) { next; }
 	my @to_correct;
+	
+	# Probably here's where the error is...
+
 	foreach my $missing (@{$$scan_record{'scantron.missingerror'}}) {
 	    if ($missing > $max_bubble) { next; }
+	    &Apache::lonnet::logthis("Marking $missing for missing bubble check");
 	    push(@to_correct,$missing);
 	}
 	if (@to_correct) {