--- trunk/OOPSE/libmdtools/Integrator.cpp	2003/09/22 21:23:25	780
+++ trunk/OOPSE/libmdtools/Integrator.cpp	2003/09/22 23:07:57	781
@@ -177,6 +177,13 @@ template<typename T> void Integrator<T>::integrate(voi
   // initialize the forces before the first step
 
   calcForce(1, 1);
+
+  if (nConstrained){
+    preMove();
+    constrainA();
+    calcForce(1, 1);    
+    constrainB();
+  }
   
   if (info->setTemp){
     thermalize();