message: Fix parallel file I/O bug for ParaView output
diff: @@ -809,7 +809,7 @@ void ParaViewDataCollection::Save()
  // the directory is created
  // create pvd file if needed
  - if (!pvd_stream.is_open())
  + if (myid == 0 && !pvd_stream.is_open())
  {
  std::string dpath=GenerateCollectionPath();
  std::string pvdname=dpath+"/"+GeneratePVDFileName();
  