--- loncom/build/help_graphics_converter.pl	2002/07/19 16:56:23	1.3
+++ loncom/build/help_graphics_converter.pl	2002/08/19 21:40:55	1.4
@@ -38,6 +38,15 @@ if (not (-d $dirprefix . "png/"))
 mkdir $dirprefix . "gif/", 0755;
 mkdir $dirprefix . "eps/", 0755;
 
+my $convert = `which convert`;
+if ($convert eq '')
+{
+    open LOG, ">> WARNINGS";
+    print LOG "**** ERROR **** ImageMagick is not installed. You must install ImageMagick to use LON-CAPA. Please see your installation instructions.\n";
+    print "**** ERROR **** ImageMagick is not installed. You must install ImageMagick to use LON-CAPA. Please see your installation instructions.\n";
+    exit;
+}
+
 foreach my $file (glob($dirprefix . "png/*.png"))
 {
     my $filename = substr($file, rindex($file, "/") + 1);