--- loncom/interface/loncommon.pm	2022/10/27 20:30:11	1.1393
+++ loncom/interface/loncommon.pm	2022/10/29 17:44:05	1.1394
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # a pile of common routines
 #
-# $Id: loncommon.pm,v 1.1393 2022/10/27 20:30:11 raeburn Exp $
+# $Id: loncommon.pm,v 1.1394 2022/10/29 17:44:05 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -18673,15 +18673,23 @@ sub validate_folderpath {
     my ($supplementalflag,$allowed,$coursenum,$coursedom) = @_;
     if ($env{'form.folderpath'} ne '') {
         my @items = split(/\&/,$env{'form.folderpath'});
-        my ($badpath,$got_supp,$supppath,%supphidden,%suppids);
+        my ($badpath,$changed,$got_supp,$supppath,%supphidden,%suppids);
         for (my $i=0; $i<@items; $i++) {
             my $odd = $i%2;
             if (($odd) && (!$supplementalflag) && ($items[$i] !~ /^[^:]*:(|\d+):(|1):(|1):(|1):(|1)$/)) {
                 $badpath = 1;
-            } elsif ($odd && $supplementalflag && $allowed) {
-                my $suffix;
+            } elsif ($odd && $supplementalflag) {
                 my $idx = $i-1;
-                if (($items[$i] !~ /^[^:]*::(|1):::$/) && ($items[$idx] ne 'supplemental')) {
+                if ($items[$i] =~ /^([^:]*)::(|1):::$/) {
+                    my $esc_name = $1;
+                    if ((!$allowed) || ($items[$idx] eq 'supplemental')) {
+                        $supppath .= '&'.$esc_name;
+                        $changed = 1;
+                    } else {
+                        $supppath .= '&'.$items[$i];
+                    }
+                } elsif (($allowed) && ($items[$idx] ne 'supplemental')) {
+                    $changed = 1;
                     my $is_hidden;
                     unless ($got_supp) {
                         my ($supplemental) = &Apache::lonnet::get_supplemental($coursenum,$coursedom);
@@ -18701,19 +18709,20 @@ sub validate_folderpath {
                             $is_hidden = 1;
                         }
                     }
-                    $suffix = '::'.$is_hidden.':::';
+                    $supppath .= '&'.$items[$i].'::'.$is_hidden.':::';
+                } else {
+                    $supppath .= '&'.$items[$i];
                 }
-                $supppath .= '&'.$items[$i].$suffix;
             } elsif ((!$odd) && ($items[$i] !~ /^(default|supplemental)(|_\d+)$/)) {
                 $badpath = 1;
-            } elsif (!$odd && $supplementalflag && $allowed) {
+            } elsif ($supplementalflag) {
                 $supppath .= '&'.$items[$i];
             }
             last if ($badpath);
         }
         if ($badpath) {
             delete($env{'form.folderpath'});
-        } elsif ($supplementalflag && $allowed) {
+        } elsif ($changed && $supplementalflag) {
             $supppath =~ s/^\&//;
             $env{'form.folderpath'} = $supppath;
         }