/uscms_data/d3/jdulemba/CMSSW_7_4_7/src/Analyses/URTTbar/src/TTPermutator.cc:89:52: error: invalid use of incomplete type 'class IDMet'
         nusolverlj_.NuSolverLJ(bjet1, lepton_, met_->Px(), met_->Py(), 1, 1, 0.); // blep, lepton, met px, met py
                                                    ^
In file included from /uscms_data/d3/jdulemba/CMSSW_7_4_7/src/Analyses/URTTbar/interface/TTPermutator.h:4:0,
                 from /uscms_data/d3/jdulemba/CMSSW_7_4_7/src/Analyses/URTTbar/src/TTPermutator.cc:1:
/uscms_data/d3/jdulemba/CMSSW_7_4_7/src/Analyses/URTTbar/interface/Permutation.h:13:7: error: forward declaration of 'class IDMet'
 class IDMet;
       ^
/uscms_data/d3/jdulemba/CMSSW_7_4_7/src/Analyses/URTTbar/src/TTPermutator.cc:89:64: error: invalid use of incomplete type 'class IDMet'
         nusolverlj_.NuSolverLJ(bjet1, lepton_, met_->Px(), met_->Py(), 1, 1, 0.); // blep, lepton, met px, met py