diff --git a/tests/lbpm_color_simulator.cpp b/tests/lbpm_color_simulator.cpp
index 64402c0f..a7a9f19f 100644
--- a/tests/lbpm_color_simulator.cpp
+++ b/tests/lbpm_color_simulator.cpp
@@ -375,6 +375,21 @@ int main(int argc, char **argv)
 	fread(id,1,N,IDFILE);
 	fclose(IDFILE);
 
+	/*	for ( k=0;k<Nz;k++){
+		for ( j=0;j<Ny;j++){
+			for ( i=0;i<Nx;i++){
+				n = k*Nx*Ny+j*Nx+i;
+				// The following turns off communication if external BC are being set
+				if (BoundaryCondition > 0){
+					if (kproc==0 && k==0)			id[n]=0;
+					if (kproc==0 && k==1)			id[n]=0;
+					if (kproc==nprocz-1 && k==Nz-2)	id[n]=0;
+					if (kproc==nprocz-1 && k==Nz-1)	id[n]=0;
+				}
+			}
+		}
+	}
+	*/
 	// Set up kstart, kfinish so that the reservoirs are excluded from averaging
 	int kstart,kfinish;
 	kstart = 1;