Index: trunk/psconfig/pscheckperl
===================================================================
--- trunk/psconfig/pscheckperl	(revision 40786)
+++ trunk/psconfig/pscheckperl	(revision 42377)
@@ -2,4 +2,5 @@
 
 $tagsets = "tagsets";
+if (!-d $tagsets || !-r $tagsets || !-x $tagsets) { die "missing the directory of distribution tables: $tagsets\n"; }
 
 $version = "";
@@ -40,6 +41,5 @@
 
 if ( @ARGV == 0) {
-    @list = <$tagsets/*.perl>;
-    $file = $list[-1];
+    die "a distribution name is now required by pscheckperl (e.g., ipp-ubuntu)\n";
 } else {
     $file = "$tagsets/$ARGV[0].perl";