diff --git a/models/ColorModel.cpp b/models/ColorModel.cpp
index 6bcb6474..7dfe063f 100644
--- a/models/ColorModel.cpp
+++ b/models/ColorModel.cpp
@@ -95,7 +95,7 @@ void ScaLBL_ColorModel::ReadParams(string filename){
 	outletA=0.f;
 	outletB=1.f;
 
-	if (BoundaryCondition==4) flux = din*rhoA; // mass flux must adjust for density (see formulation for details)
+	if (BoundaryCondition==4) flux *= rhoA; // mass flux must adjust for density (see formulation for details)
 
 	// Read domain parameters
 	auto L = domain_db->getVector<double>( "L" );
diff --git a/sample_scripts/configure_desktop b/sample_scripts/configure_desktop
index ccf6f713..1e717c98 100755
--- a/sample_scripts/configure_desktop
+++ b/sample_scripts/configure_desktop
@@ -10,7 +10,7 @@ cmake                                    \
     -D MPI_COMPILER:BOOL=TRUE            \
     -D MPIEXEC=mpirun                     \
     -D USE_EXT_MPI_FOR_SERIAL_TESTS:BOOL=TRUE \
-    -D CMAKE_BUILD_TYPE:STRING=Debug     \
+    -D CMAKE_BUILD_TYPE:STRING=Release     \
     -D CUDA_FLAGS="-arch sm_35"          \
     -D CUDA_HOST_COMPILER="/usr/bin/gcc" \
     -D USE_NETCDF=0 			 \
diff --git a/tests/lbpm_serial_decomp.cpp b/tests/lbpm_serial_decomp.cpp
index a2d6c17c..46431c37 100644
--- a/tests/lbpm_serial_decomp.cpp
+++ b/tests/lbpm_serial_decomp.cpp
@@ -66,6 +66,12 @@ int main(int argc, char **argv)
 	auto size = domain_db->getVector<int>( "n" );
 	auto SIZE = domain_db->getVector<int>( "N" );
 	auto nproc = domain_db->getVector<int>( "nproc" );
+	if (domain_db->keyExists( "offset" )){
+		auto offset = domain_db->getVector<int>( "offset" );
+		xStart = offset[0];
+		yStart = offset[1];
+		zStart = offset[2];
+	}
 	auto ReadValues = domain_db->getVector<char>( "ReadValues" );
 	auto WriteValues = domain_db->getVector<char>( "WriteValues" );
 	auto ReadType = domain_db->getScalar<std::string>( "ReadType" );