input directories are interpreted like files

getUnfHistPt JetHT18A /nfs/dust/cms/user/connorpa/campaigns/0034/D2_applyJEScorrections/out/0.root -j 283360
getUnfHistPt 0/283360 start                                                                                                                                       
SysError in <TFile::ReadBuffer>: error reading from file JetHT18A Is a directory                                                                                  
Error in <TFile::Init>: JetHT18A failed to read the file type data.                                                                                               
SysError in <TFile::ReadBuffer>: error reading from file JetHT18A Is a directory                                                                                  
Error in <TFile::Init>: JetHT18A failed to read the file type data.              
/afs/desy.de/group/cms/pool/connorpa/Darwin/src/Flow.cc(75): Throw in function Darwin::Tools::ChainSlice* Darwin::Tools::Flow::GetInputTree(std::vector<std::files
ystem::__cxx11::path>, Darwin::Tools::Slice, const std::string&)                                                                                                  
Dynamic exception type: boost::wrapexcept<Darwin::Exceptions::BadInput>                                                                                           std::exception::what: The tree cannot be found in (one of) the input file(s).                                                                                     
TFile**         JetHT18A                                                                                                                                          
 TFile*         JetHT18A                                                         
                                                                                 
To reproduce error, you may run:                                                                                                                                  
getUnfHistPt /nfs/dust/cms/user/connorpa/campaigns/0034/D2_applyJEScorrections/JetHT18A /nfs/dust/cms/user/connorpa/campaigns/0034/D2_applyJEScorrections/out/0.ro
ot