--- loncom/homework/bridgetask.pm	2006/03/30 16:50:18	1.128.2.4
+++ loncom/homework/bridgetask.pm	2006/03/29 20:33:01	1.131
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA 
 # definition of tags that give a structure to a document
 #
-# $Id: bridgetask.pm,v 1.128.2.4 2006/03/30 16:50:18 albertel Exp $
+# $Id: bridgetask.pm,v 1.131 2006/03/29 20:33:01 albertel Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -455,7 +455,11 @@ sub start_Task {
 		    my $files = '<ul>';
 		    foreach my $file (@files) {
 			my $url="/uploaded/$domain/$user/portfolio$file";
-			$file = '<tt>'.$file.'</tt>';
+			if (! &Apache::lonnet::stat_file($url)) {
+			    $file = &mt('<font color="red"> Nonexistant file:</font> <tt>[_1]</tt>',$file);
+			} else {
+			    $file = '<tt>'.$file.'</tt>';
+			}
 			$files .= '<li>'.$file.'</li>';
 		    }
 		    $files.='</ul>';
@@ -1872,6 +1876,9 @@ sub start_IntroParagraph {
 	
 	} elsif ($tagstack->[-2] eq 'Task' && $target eq 'webgrade') {
 	    &Apache::lonxml::startredirection();
+	} else {
+	    &Apache:;lonxml::error("Invalid use of <IntroParagraph> inside of <".$tagstack->[-2].">");
+	    &Apache::lonxml::get_all_text('/introparagraph',$parser,$style);
 	}
 	
     }