Index: /trunk/ippScripts/scripts/warp_overlap.pl
===================================================================
--- /trunk/ippScripts/scripts/warp_overlap.pl	(revision 13640)
+++ /trunk/ippScripts/scripts/warp_overlap.pl	(revision 13641)
@@ -92,8 +92,8 @@
     foreach my $tess_id ( keys %$tessellations ) {
 	### Because DVO doesn't use psModules, it doesn't understand Nebulous --- check
-	my $uri = URI->new( $$tessellations{$tess_id} );
-	if (defined $uri->scheme() and $uri->scheme() eq 'neb') {
+	my ($scheme) = $$tessellations{$tess_id} =~ m|^(\S+):|; # The scheme, e.g., file://, path://
+	if (defined $scheme and lc($scheme) eq 'neb') {
 	    &my_die("Tessellation $tess_id refers to a Nebulous path: $$tessellations{$tess_id}", $warp_id, $PS_EXIT_CONFIG_ERROR);
-	}		    
+	}
 	
 	my $tess_dir = $ipprc->convert_filename_absolute( $$tessellations{$tess_id} ); # Catdir for DVO