diff --git a/src/main.cpp b/src/main.cpp
index ea0c547..00d49ca 100755
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -659,12 +659,13 @@ int main(int argc, char *argv[]) {
 
     std::cout << "Generating Attack Graph: " << std::flush;
     AGGen gen(_instance);//use AGGen class to instantiate an obj with the name gen! _instance obj as the parameter! constructor defined in ag_gen.cpp
-    postinstance = gen.generate(batch_process, batch_size, thread_count, init_qsize, alpha, world); //The method call to generate the attack graph, defined in ag_gen.cpp.
+    if(world.rank() == 0)
+        postinstance = gen.generate(batch_process, batch_size, thread_count, init_qsize, alpha, world); //The method call to generate the attack graph, defined in ag_gen.cpp.
     
     world.barrier();
     //Serialization Unit Testing on Postinstance Data
-    serialization_unit_testing(postinstance, world);
-    world.barrier();
+    //serialization_unit_testing(postinstance, world);
+    //world.barrier();
     std::cout << "Done\n";
     //std::cout << "# of edges " <<postinstance.edges.size()<<std::endl;
     //std::cout << "# of edge_asset_binding" <<postinstance.edges.size()<<std::endl;