Index: /tags/ipp-20101215/ippScripts/scripts/magic_destreak_revert.pl
===================================================================
--- /tags/ipp-20101215/ippScripts/scripts/magic_destreak_revert.pl	(revision 30408)
+++ /tags/ipp-20101215/ippScripts/scripts/magic_destreak_revert.pl	(revision 30409)
@@ -210,9 +210,11 @@
     $bweight = $ipprc->filename("PPIMAGE.CHIP.VARIANCE", $backup_path_base, $class_id);
 
-    $rimage  = $ipprc->filename("PPIMAGE.CHIP", $recovery_path_base, $class_id);
-    # This is somewhat kludgey but it works whether the mask is camera mask or chip mask
-    $rmask   = dirname($recovery_path_base) . "/REC_" . basename($mask);
-    $rch_mask= $ipprc->filename("PPIMAGE.CHIP.MASK", $recovery_path_base, $class_id);
-    $rweight = $ipprc->filename("PPIMAGE.CHIP.VARIANCE", $recovery_path_base, $class_id);
+    if ($recovery_path_base) {
+        $rimage  = $ipprc->filename("PPIMAGE.CHIP", $recovery_path_base, $class_id);
+	# This is somewhat kludgey but it works whether the mask is camera mask or chip mask
+	$rmask   = dirname($recovery_path_base) . "/REC_" . basename($mask);
+	$rch_mask= $ipprc->filename("PPIMAGE.CHIP.MASK", $recovery_path_base, $class_id);
+	$rweight = $ipprc->filename("PPIMAGE.CHIP.VARIANCE", $recovery_path_base, $class_id);
+    }
 } elsif ($stage eq "camera") {
     $astrom =  $ipprc->filename("PSASTRO.OUTPUT", $path_base);
@@ -227,7 +229,9 @@
     $bweight = $ipprc->filename("PSWARP.OUTPUT.VARIANCE", $backup_path_base);
     $bsources = $ipprc->filename("PSWARP.OUTPUT.SOURCES", $backup_path_base);
-    $rimage  = $ipprc->filename("PSWARP.OUTPUT", $recovery_path_base);
-    $rmask   = $ipprc->filename("PSWARP.OUTPUT.MASK", $recovery_path_base);
-    $rweight = $ipprc->filename("PSWARP.OUTPUT.VARIANCE", $recovery_path_base);
+    if ($recovery_path_base) {
+        $rimage  = $ipprc->filename("PSWARP.OUTPUT", $recovery_path_base);
+        $rmask   = $ipprc->filename("PSWARP.OUTPUT.MASK", $recovery_path_base);
+        $rweight = $ipprc->filename("PSWARP.OUTPUT.VARIANCE", $recovery_path_base);
+    }
 } elsif ($stage eq "diff") {
     my $name = "PPSUB.OUTPUT";