--- loncom/xml/run.pm	2002/04/10 14:46:30	1.25
+++ loncom/xml/run.pm	2002/04/10 15:22:02	1.26
@@ -1,6 +1,6 @@
 package Apache::run;
 #
-# $Id: run.pm,v 1.25 2002/04/10 14:46:30 matthew Exp $
+# $Id: run.pm,v 1.26 2002/04/10 15:22:02 albertel Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -25,6 +25,8 @@ package Apache::run;
 # http://www.lon-capa.org/
 #
 
+use HTML::Entities;
+
 $Apache::run::EVALUATE_STRING=<<'ENDEVALUATE';  
   my %_LONCAPA_INTERNAL_oldexpressions=();
   my $i=0;
@@ -44,11 +46,14 @@ sub evaluate {
   $safeeval->reval('{'.$decls.';$_=<<\'EXPRESSION\';'."\n".$expression.
 		   "\n".'EXPRESSION'."\n".$EVALUATE_STRING.'}');
 #  $safeeval->reval('{'.$decls.';<< &evaluate(q|'.$expression.'|);}');
+  my $error=$@;
   if ($@ eq '') {
     $result = $safeeval->reval('return $_;');
     chomp $result;
   } else {
-    &Apache::lonxml::error("substitution on:$expression:with:$decls:caused $@");
+    &Apache::lonxml::error('substitution on <pre>'.$expression.
+			   '</pre> with <pre>'.$decls.
+			   '</pre> caused <pre>'.$error);
   }  
   return $result
 }
@@ -58,9 +63,11 @@ sub run {
 #  print "inside run\n";
   $@='';
   my (@result)=$safeeval->reval($code);
-  if ($@ ne '' && !$hideerrors) {
-    # Put in newline to make display of code easier to read.
-    &Apache::lonxml::error(":$@: occured while running :\n$code");
+  my $error=$@;
+  if ($error ne '' && !$hideerrors) {
+    &Apache::lonxml::error('<pre>'.&HTML::Entities::encode($error).
+			   '</pre> occured while running <pre>'.
+			   &HTML::Entities::encode($code).'</pre>');
   }
   if ( $#result < '1') {
     return $result[0];