--- loncom/xml/lonplot.pm	2002/01/09 16:51:51	1.35
+++ loncom/xml/lonplot.pm	2002/01/09 16:58:18	1.36
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # Dynamic plot
 #
-# $Id: lonplot.pm,v 1.35 2002/01/09 16:51:51 matthew Exp $
+# $Id: lonplot.pm,v 1.36 2002/01/09 16:58:18 matthew Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -633,7 +633,7 @@ sub start_data {
 	}
 	# complain if the number of data points is not the same as
 	# in previous sets of data.
-	if (($curves[-1]->{'data'}) && ($#data != $#{$curves[-1]->{'data'}})){
+	if (($curves[-1]->{'data'}) && ($#data != $#{@{$curves[-1]->{'data'}->[0]}})){
 	    &Apache::lonxml::warning
 		('Number of data points is not consistent with previous '.
 		 'number of data points');