diff --git a/cpu/MixedGradient.cpp b/cpu/MixedGradient.cpp
index 841dbdf1..b5b18694 100644
--- a/cpu/MixedGradient.cpp
+++ b/cpu/MixedGradient.cpp
@@ -7,7 +7,7 @@ extern "C" void ScaLBL_D3Q19_MixedGradient(int *Map, double *Phi, double *Gradie
 			{1,0,1},{-1,0,-1},{1,0,-1},{-1,0,1},
 			{0,1,1},{0,-1,-1},{0,1,-1},{0,-1,1}};
 	
-	int i,j,k,n,N;
+	int i,j,k,n;
 	int np,np2,nm; // neighbors
 	double v,vp,vp2,vm; // values at neighbors
 	double grad;
diff --git a/example/Bubble/input.db b/example/Bubble/input.db
index e149b027..dd6d956b 100644
--- a/example/Bubble/input.db
+++ b/example/Bubble/input.db
@@ -12,6 +12,22 @@ Color {
     ComponentAffinity = -1.0, 1.0, -1.0
 }
 
+FreeLee {
+    tauA = 1.0;  
+    tauB = 1.0;  
+    tauM = 1.0;//relaxation parameter for the phase field
+    rhoA   = 1.0;  
+    rhoB   = 1.0;  
+    gamma = 1.0e-4;//surface tension parameter in Lee model
+    W = 3.0; //theoretical interfacial thickness in Lee model; unit:[voxel]
+    F = 0, 0, 0
+    Restart = false
+    timestepMax = 1000
+    flux = 0.0
+    ComponentLabels = 0
+    ComponentAffinity = -1.0
+}
+
 Domain {
     nproc = 1, 1, 1     // Number of processors (Npx,Npy,Npz)
     n = 80, 80, 80      // Size of local domain (Nx,Ny,Nz)
diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index 44f869bf..320de0a6 100755
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -62,7 +62,7 @@ ADD_LBPM_TEST( TestMap )
 ADD_LBPM_TEST( TestWideHalo )
 ADD_LBPM_TEST( TestColorGradDFH )
 ADD_LBPM_TEST( TestBubbleDFH ../example/Bubble/input.db)
-ADD_LBPM_TEST( testGlobalMassFreeLee ../example/Bubble/input.db)
+#ADD_LBPM_TEST( testGlobalMassFreeLee ../example/Bubble/input.db)
 #ADD_LBPM_TEST( TestColorMassBounceback ../example/Bubble/input.db)
 ADD_LBPM_TEST( TestPressVel  ../example/Bubble/input.db)
 ADD_LBPM_TEST( TestPoiseuille ../example/Piston/poiseuille.db)