Index: trunk/Mars/msignal/MExtractFACT.cc
===================================================================
--- trunk/Mars/msignal/MExtractFACT.cc	(revision 18271)
+++ trunk/Mars/msignal/MExtractFACT.cc	(revision 18272)
@@ -226,5 +226,5 @@
         {
             time = gRandom->Uniform(rangehi)+fHiGainFirst+1;
-            max  = pbeg[uint16_t(time)];
+            max  = ptr[uint16_t(time)];
         }