Index: /trunk/MagicSoft/Mars/mcalib/MCalibrationIntensityCam.cc
===================================================================
--- /trunk/MagicSoft/Mars/mcalib/MCalibrationIntensityCam.cc	(revision 4910)
+++ /trunk/MagicSoft/Mars/mcalib/MCalibrationIntensityCam.cc	(revision 4911)
@@ -195,9 +195,11 @@
 // -------------------------------------------------------------------
 //
-// Calls Init(geom) for fCams
+// If size is still 0, Intialize a first Cam.
+// Calls Init(geom) for all fCams
 //
 void MCalibrationIntensityCam::Init(const MGeomCam &geom)
 {
-  InitSize(1);
+  if (GetSize() == 0)
+    InitSize(1);
   fCams->ForEach(MCalibrationCam,Init)(geom);
 }