@@ -439,9 +439,16 @@ public:

 			caltbl.setY(y);

 			caltbl.setX(x);

 			unsigned nX = x.size();

-			bt->maxValue = caltbl.getX()[nX-1];

-			bt->channelRange = caltbl.getY()[nX-1];

+			if(nX==0)

+			{//assign the default values when caltbl is not present in xml

+				bt->maxValue = 262144;

+				bt->channelRange = 4096;

+			}else

+			{

+				bt->maxValue = caltbl.getX()[nX-1];

+				bt->channelRange = caltbl.getY()[nX-1];

+			}

 			transformation * curTran = bt;

 			/*

 			 * sometime, the biexp parameters may not be stored properly