--- loncom/interface/loncoursegroups.pm	2008/12/16 23:19:19	1.80.2.2
+++ loncom/interface/loncoursegroups.pm	2008/12/16 23:52:08	1.80.2.3
@@ -1,6 +1,6 @@
 # The LearningOnline Network with CAPA
 #
-# $Id: loncoursegroups.pm,v 1.80.2.2 2008/12/16 23:19:19 raeburn Exp $
+# $Id: loncoursegroups.pm,v 1.80.2.3 2008/12/16 23:52:08 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -1259,12 +1259,18 @@ sub reenable_folder {
 
 sub modify_folders {
     my ($cdom,$cnum,$groupname) = @_;
-    my $outcome;
+    my ($outcome,$groupmap,$groupmapres,$map,$id,$src);
     my $navmap = Apache::lonnavmaps::navmap->new();
-    my $groupmap = '/uploaded/'.$cdom.'/'.$cnum.'/'.'group_folder_'.
+    if (!defined($navmap)) {
+        $outcome = '<div class="LC_error">'.
+                   &mt('Error reading course contents.').' '.
+                   &mt('You need to re-initialize the course.').
+                   '</div>';
+        return $outcome;
+    }
+    $groupmap = '/uploaded/'.$cdom.'/'.$cnum.'/'.'group_folder_'.
                    $groupname.'.sequence';
-    my $groupmapres = $navmap->getResourceByUrl($groupmap);
-    my ($map,$id,$src);
+    $groupmapres = $navmap->getResourceByUrl($groupmap);
     if ($groupmapres) {
         ($map,$id,$src)=&Apache::lonnet::decode_symb($groupmapres->symb());
     }
@@ -3222,36 +3228,49 @@ sub write_group_data {
                 my $crspath = '/uploaded/'.$cdom.'/'.$cnum.'/';
                 my $boardsmap = $crspath.'group_boards_'.$groupname.'.sequence';
                 my $navmap = Apache::lonnavmaps::navmap->new();
-                my $bbmapres = $navmap->getResourceByUrl($boardsmap);
-                undef($navmap);
-                if (!$bbmapres) {
-                    my $grpmap = $crspath.'group_folder_'.$groupname.'.sequence';
-                    my $disctitle = &mt('Discussion Boards');
-                    my $outcome = &map_updater($cdom,$cnum,'group_boards_'.
-                                               $groupname.'.sequence','bbseq',
-                                               $disctitle,$grpmap);
-                    my ($furl,$ferr) = 
-                        &Apache::lonuserstate::readmap($cdom.'/'.$cnum);
-                    $navmap = Apache::lonnavmaps::navmap->new();
-                    # modify parameter
-                    if ($outcome eq 'ok') {
-                        my $parm_result = &parm_setter($navmap,$cdom,$boardsmap,
-                                                       $groupname);
-                        if ($parm_result) {
-                            $r->print('<div class="LC_error">'
-                                     .&mt('An error occurred while setting parameters '
-                                         .'for Discussion Boards folder: '
-                                         .'[_1]',$parm_result)
-                                     .'</div>');
+                my ($bbmapres,$error);
+                if (defined($navmap)) {
+                    $bbmapres = $navmap->getResourceByUrl($boardsmap);
+                    undef($navmap);
+                    if (!$bbmapres) {
+                        my $grpmap = $crspath.'group_folder_'.$groupname.'.sequence';
+                        my $disctitle = &mt('Discussion Boards');
+                        my $outcome = &map_updater($cdom,$cnum,'group_boards_'.
+                                                   $groupname.'.sequence','bbseq',
+                                                   $disctitle,$grpmap);
+                        my ($furl,$ferr) =
+                            &Apache::lonuserstate::readmap($cdom.'/'.$cnum);
+                        # modify parameter
+                        if ($outcome eq 'ok') {
+                            $navmap = Apache::lonnavmaps::navmap->new();
+                            if (defined($navmap)) {
+                                my $parm_result = &parm_setter($navmap,$cdom,$boardsmap,
+                                                               $groupname);
+                                if ($parm_result) {
+                                    $error = &mt('An error occurred while setting parameters '
+                                             .'for Discussion Boards folder: '
+                                             .'[_1]',$parm_result);
+                                } else {
+                                    $r->print('<div class="LC_success">'.
+                                              &mt('Discussion Boards Folder created.')
+                                              .'</div>');
+                                }
+                                undef($navmap);
+                            } else {
+                                $error = &mt('An error occurred while setting parameters '.
+                                             'for Discussion Boards folder: '.
+                                             'Could not retrieve course information' );
+                            }
                         } else {
-                            $r->print('<div class="LC_success">'
-                                     .&mt('Discussion Boards Folder created.')
-                                     .'</div>');
+                            $r->print($outcome);
                         }
-                    } else {
-                        $r->print($outcome);
                     }
-                    undef($navmap);
+                } else {
+                    $error = &mt("An error occurred while retrieving the contents of the group's folder.").'<br />'.
+                             &mt('You need to re-initialize the course.');
+                }
+                if ($error ne '') {
+                    $r->print('<div class="LC_error">'.$error.'</div>');
                 }
             }
             $r->print('<div class="LC_success">'
@@ -3828,6 +3847,10 @@ sub add_group_folder {
     }
     my ($furl,$ferr)= &Apache::lonuserstate::readmap($cdom.'/'.$cnum);
     my $navmap = Apache::lonnavmaps::navmap->new();
+    if (!defined($navmap)) {
+        return $warning.'<span class="LC_error">'.&mt('Error retrieving course contents').
+               ' '.&mt('You need to re-initialize the course.').'</span>';
+    }
     # modify parameters
     my $parm_result;
     if ($action eq 'create') {
@@ -3933,6 +3956,13 @@ sub new_map {
 sub parm_setter {
     my ($navmap,$cdom,$url,$groupname) = @_;
     my $allresults;
+    if (!defined($navmap)) {
+        $allresults = '<div class="LC_warning">'.
+                      &mt('Parameters not set for [_1] because the contents of the course could not be retrieved.',$url).' '.
+                      &mt('You need to reinitialize the course.').
+                      '</div>';
+        return $allresults;
+    }
     my %hide_settings = (
                            'course' =>  {
                                           'num' => 13,