Index: /trunk/Mars/mcore/DrsCalib.h
===================================================================
--- /trunk/Mars/mcore/DrsCalib.h	(revision 12478)
+++ /trunk/Mars/mcore/DrsCalib.h	(revision 12479)
@@ -437,7 +437,9 @@
         float *base = vec.data();
 
-        file.SetPtrAddress("RunNumberBaseline",      base,   1);
-        file.SetPtrAddress("RunNumberGain",          base+1, 1);
-        file.SetPtrAddress("RunNumberTriggerOffset", base+2, 1);
+        reinterpret_cast<uint32_t*>(base)[0] = fRoi;
+
+        file.SetPtrAddress("RunNumberBaseline",      base+1, 1);
+        file.SetPtrAddress("RunNumberGain",          base+2, 1);
+        file.SetPtrAddress("RunNumberTriggerOffset", base+3, 1);
         file.SetPtrAddress("BaselineMean",           base+4+0*1024*1440,                           1024*1440);
         file.SetPtrAddress("BaselineRms",            base+4+1*1024*1440,                           1024*1440);