diff --git a/src/lagrangian/cfdemParticle/subModels/chemistryModel/chemistryModel/chemistryModel.H b/src/lagrangian/cfdemParticle/subModels/chemistryModel/chemistryModel/chemistryModel.H
index 514893ff..e9a7c890 100644
--- a/src/lagrangian/cfdemParticle/subModels/chemistryModel/chemistryModel/chemistryModel.H
+++ b/src/lagrangian/cfdemParticle/subModels/chemistryModel/chemistryModel/chemistryModel.H
@@ -94,9 +94,9 @@ public:
 
        virtual void execute() = 0;
        
-       virtual tmp<fvScalarMatrix> Smi (const label i) const = 0;
+//       virtual tmp<fvScalarMatrix> Smi (const label i) const = 0;
 
-       virtual tmp<fvScalarMatrix> Sm () const = 0;
+//       virtual tmp<fvScalarMatrix> Sm () const = 0;
 
 
 };
diff --git a/src/lagrangian/cfdemParticle/subModels/chemistryModel/noChemistry/noChemistry.C b/src/lagrangian/cfdemParticle/subModels/chemistryModel/noChemistry/noChemistry.C
index a052b45d..a5a03a58 100644
--- a/src/lagrangian/cfdemParticle/subModels/chemistryModel/noChemistry/noChemistry.C
+++ b/src/lagrangian/cfdemParticle/subModels/chemistryModel/noChemistry/noChemistry.C
@@ -57,7 +57,7 @@ noChemistry::~noChemistry()
 void noChemistry::execute()
 {}
 
-tmp<Foam::fvScalarMatrix> noChemistry::Smi(const label i) const
+/*tmp<Foam::fvScalarMatrix> noChemistry::Smi(const label i) const
 {
     tmp<volScalarField> mi
     (
@@ -109,7 +109,7 @@ tmp<Foam::fvScalarMatrix> noChemistry::Sm() const
     );
 
     return tmp<fvScalarMatrix>(new fvScalarMatrix(mi, dimMass/dimTime));
-}
+}*/
 
 
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
diff --git a/src/lagrangian/cfdemParticle/subModels/chemistryModel/noChemistry/noChemistry.H b/src/lagrangian/cfdemParticle/subModels/chemistryModel/noChemistry/noChemistry.H
index 688fc3a0..38c2710c 100644
--- a/src/lagrangian/cfdemParticle/subModels/chemistryModel/noChemistry/noChemistry.H
+++ b/src/lagrangian/cfdemParticle/subModels/chemistryModel/noChemistry/noChemistry.H
@@ -68,9 +68,9 @@ public:
 
     void execute();
 
-    tmp<fvScalarMatrix> Smi(const label i) const;
+//    tmp<fvScalarMatrix> Smi(const label i) const;
 
-    tmp<fvScalarMatrix> Sm() const;
+//    tmp<fvScalarMatrix> Sm() const;
 
 
 };