Index: trunk/ppSim/src/ppSimCreate.c
===================================================================
--- trunk/ppSim/src/ppSimCreate.c	(revision 41329)
+++ trunk/ppSim/src/ppSimCreate.c	(revision 41330)
@@ -161,6 +161,6 @@
 
     // XXXX TEST this is causing trouble for unknown reasons -- output step is blowing up.
-    // simSources->save = true;
-    simSources->save = false;
+    simSources->save = true;
+    // simSources->save = false;
 
     // if we have loaded an input image, we derive certain values from the image, if possible
Index: trunk/ppSim/src/ppSimMakeSky.c
===================================================================
--- trunk/ppSim/src/ppSimMakeSky.c	(revision 41329)
+++ trunk/ppSim/src/ppSimMakeSky.c	(revision 41330)
@@ -89,4 +89,8 @@
               signal->data.F32[y][x] += skyFlux;
               variance->data.F32[y][x] += skyFlux;
+
+	      if ((x == (int)(signal->numCols / 2)) && (y == (int)(signal->numRows / 2))) {
+		psLogMsg("ppSim", PS_LOG_INFO, "Generating sky at image center = %f cnts / pixel\n", skyFlux);
+	      }
             }
 
@@ -101,4 +105,5 @@
         }
     }
+
     psFree(bounds);
     return true;