--- trunk/OOPSE/libmdtools/ConstraintAlgorithm.hpp	2004/06/07 14:26:33	1252
+++ trunk/OOPSE/libmdtools/ConstraintAlgorithm.hpp	2004/06/09 16:16:33	1254
@@ -15,11 +15,12 @@ enum ConsAlgoStatus{
 class SimInfo;
 
 enum ConsAlgoStatus{
-  consPairHandlerFail = -3,
-  consElemHandlerFail = -2,
-  consFail = -1,
-  consSuccess = 0,
-  consAlready = 1};
+  consExceedMaxIter = -4, //can not constrain the bond within maximum iteration
+  consPairHandlerFail = -3, //can not found call back functor for constraint pair 
+  consElemHandlerFail = -2, //can not found callback functor for constraint element 
+  consFail = -1,  //Constraint Fail
+  consSuccess = 0,  //constrain the pair by moving two elements
+  consAlready = 1}; //current pair is already constrained, do not need to move the elements
 
 ////////////////////////////////////////////////////////////////////////////////
 //Declaration of ConstraintAlgorithm