diff --git a/src/lagrangian/molecularDynamics/molecule/interactionLists/referredCellList/referredCellList.C b/src/lagrangian/molecularDynamics/molecule/interactionLists/referredCellList/referredCellList.C
index 5f49f206d8..3285a68eb7 100644
--- a/src/lagrangian/molecularDynamics/molecule/interactionLists/referredCellList/referredCellList.C
+++ b/src/lagrangian/molecularDynamics/molecule/interactionLists/referredCellList/referredCellList.C
@@ -234,8 +234,7 @@ void Foam::referredCellList::buildReferredCellList
                 OPstream toNeighbProc
                 (
                     Pstream::blocking,
-                    patch.neighbProcNo(),
-                    + 2*(sizeof(label) + patch.size()*sizeof(vector))
+                    patch.neighbProcNo()
                 );
 
                 toNeighbProc << patch.faceCentres() << patch.faceAreas();
@@ -261,8 +260,7 @@ void Foam::referredCellList::buildReferredCellList
                 IPstream fromNeighbProc
                 (
                     Pstream::blocking,
-                    patch.neighbProcNo(),
-                    2*(sizeof(label) + patch.size()*sizeof(vector))
+                    patch.neighbProcNo()
                 );
 
                 fromNeighbProc >> neighbFaceCentres >> neighbFaceAreas;
diff --git a/src/lagrangian/molecularDynamics/molecule/mdTools/meanMomentumEnergyAndNMols.H b/src/lagrangian/molecularDynamics/molecule/mdTools/meanMomentumEnergyAndNMols.H
index 8266c78c25..6429eb5698 100644
--- a/src/lagrangian/molecularDynamics/molecule/mdTools/meanMomentumEnergyAndNMols.H
+++ b/src/lagrangian/molecularDynamics/molecule/mdTools/meanMomentumEnergyAndNMols.H
@@ -48,7 +48,7 @@ scalar singleStepTotalPE = 0.0;
 
 scalar singleStepTotalrDotf = 0.0;
 
-vector singleStepCentreOfMass(vector::zero);
+//vector singleStepCentreOfMass(vector::zero);
 
 label singleStepNMols = molecules.size();
 
@@ -68,13 +68,13 @@ label singleStepNMols = molecules.size();
 
         singleStepTotalMass += molMass;
 
-        singleStepCentreOfMass += mol().position()*molMass;
+        //singleStepCentreOfMass += mol().position()*molMass;
     }
 
-    if(singleStepNMols)
-    {
-        singleStepCentreOfMass /= singleStepTotalMass;
-    }
+    // if(singleStepNMols)
+    // {
+    //     singleStepCentreOfMass /= singleStepTotalMass;
+    // }
 
     for
     (
@@ -97,8 +97,8 @@ label singleStepNMols = molecules.size();
 
         singleStepTotalLinearMomentum += molV * molMass;
 
-        singleStepTotalAngularMomentum += molPiGlobal
-        +((mol().position() - singleStepCentreOfMass) ^ (molV * molMass));
+        singleStepTotalAngularMomentum += molPiGlobal;
+        //+((mol().position() - singleStepCentreOfMass) ^ (molV * molMass));
 
         if(mag(molV) > singleStepMaxVelocityMag)
         {