scalargroupdata.valid.at(tl).resize(scalargroupdata.numvars);

      why_valid_t why([] { return "SetupGlobals";});
      scalargroupdata.valid.at(tl).resize(scalargroupdata.numvars, why);

      groupdata.valid.at(tl).resize(groupdata.numvars);

      why_valid_t why([]{return "MakeNewLevelFromCoarse";});
      groupdata.valid.at(tl).resize(groupdata.numvars, why);