--- trunk/OOPSE/libmdtools/Integrator.hpp	2003/07/09 22:14:06	586
+++ trunk/OOPSE/libmdtools/Integrator.hpp	2003/07/10 17:10:56	588
@@ -177,7 +177,7 @@ class NPTf : public Integrator{ (protected)
   // chi and eta are the propagated degrees of freedom
 
   double chi;
-  double eta[9];
+  double eta[3][3];
   double NkBT;
 
   // targetTemp, targetPressure, and tauBarostat must be set.