diff --git a/src/qoi/src/qoi_output.C b/src/qoi/src/qoi_output.C
index 15c5791b8..997bf1784 100644
--- a/src/qoi/src/qoi_output.C
+++ b/src/qoi/src/qoi_output.C
@@ -71,7 +71,7 @@ namespace GRINS
         if( comm.rank() == 0 )
           {
             std::ofstream output;
-            output.open( _file_prefix+".dat" );
+            output.open( _file_prefix+".dat",std::ofstream::app );
 
             qois.output_qoi(output);
 
diff --git a/src/visualization/src/visualization.C b/src/visualization/src/visualization.C
index 5b46a97dc..b4a2a3c57 100644
--- a/src/visualization/src/visualization.C
+++ b/src/visualization/src/visualization.C
@@ -131,8 +131,6 @@ namespace GRINS
     filename+="."+suffix.str();
 
     this->dump_visualization( equation_system, filename, 0.0 );
-
-    return;
   }
 
   void Visualization::output_residual( std::shared_ptr<libMesh::EquationSystems> equation_system,