Index: /trunk/ippScripts/scripts/phase0_imfile.pl
===================================================================
--- /trunk/ippScripts/scripts/phase0_imfile.pl	(revision 10397)
+++ /trunk/ippScripts/scripts/phase0_imfile.pl	(revision 10398)
@@ -120,5 +120,11 @@
     }
     
-    push @command, P0TOOL_BG_MEAN(), $stats->bg_mean(), P0TOOL_BG_STDEV();
+    push @command, P0TOOL_BG_MEAN();
+    if (defined $stats->bg_mean()) {
+	push @command, $stats->bg_mean();
+    } else {
+	push @command, "NAN";
+    }
+    push @command, P0TOOL_BG_STDEV();
     if (defined($stats->bg_stdev())) {
 	push @command, $stats->bg_stdev();
@@ -127,5 +133,10 @@
 	push @command, 0;
     }
-    push @command,  P0TOOL_BG_MEAN_STDEV(), $stats->bg_mean_stdev();
+    push @command,  P0TOOL_BG_MEAN_STDEV();
+    if (defined $stats->bg_mean_stdev()) {
+	push @command, $stats->bg_mean_stdev();
+    } else {
+	push @command, "NAN";
+    }
  
     my ( $success, $error_code, $full_buf, $stdout_buf, $stderr_buf ) =