Index: trunk/psModules/src/detrend/pmFringeStats.c
===================================================================
--- trunk/psModules/src/detrend/pmFringeStats.c	(revision 34085)
+++ trunk/psModules/src/detrend/pmFringeStats.c	(revision 39926)
@@ -336,6 +336,12 @@
         dfPt[i] = 1.0 / medianSd->sampleStdev;
 
-        psTrace("psModules.detrend", 7, "[%d:%d,%d:%d]: %f %f : %s\n", (int)region.x0, (int)region.x1,
-                (int)region.y0, (int)region.y1, fPt[i], dfPt[i], readout->parent->hdu->extname);
+	if (readout->parent->hdu) {
+	  psTrace("psModules.detrend", 7, "[%d:%d,%d:%d]: %f %f : %s\n", (int)region.x0, (int)region.x1,
+		  (int)region.y0, (int)region.y1, fPt[i], dfPt[i], readout->parent->hdu->extname);
+	}
+	else {
+	  psTrace("psModules.detrend", 7, "[%d:%d,%d:%d]: %f %f : THIS_IS_A_SPOOKY_GHOST_CELL\n", (int)region.x0, (int)region.x1,
+		  (int)region.y0, (int)region.y1, fPt[i], dfPt[i]);
+	}
     }
     psFree(sky);