Index: trunk/MagicSoft/Mars/manalysis/MCerPhotEvt.cc
===================================================================
--- trunk/MagicSoft/Mars/manalysis/MCerPhotEvt.cc	(revision 3377)
+++ trunk/MagicSoft/Mars/manalysis/MCerPhotEvt.cc	(revision 3378)
@@ -432,7 +432,10 @@
 TObject *MCerPhotEvtIter::Next()
 {
+    if (!fUsedOnly)
+        return TObjArrayIter::Next();
+
     MCerPhotPix *pix;
     while ((pix = (MCerPhotPix*)TObjArrayIter::Next()))
-        if (!fUsedOnly || pix->IsPixelUsed())
+        if (pix->IsPixelUsed())
             return pix;
     return pix;