Merged with commit 322, rebased on next and added a working script to find initial conditions for SF configuration.

Author: wearysebas

src/field/field_factory.cxx

@@ -230,7 +230,9 @@ FieldFactory::FieldFactory(Mesh* localmesh, Options* opt)
   addGenerator("where", std::make_shared<FieldWhere>(nullptr, nullptr, nullptr));
 
   // Variables from the grid file
-  read_grid_variables(*this, *localmesh, nonconst_options);
+  if (fieldmesh != nullptr) {
+    read_grid_variables(*this, *fieldmesh, nonconst_options);
+  }
 }
 
 Field2D FieldFactory::create2D(const std::string& value, const Options* opt,