vtkm Error

In file included from /home/users/roba/manyCore/vtkm_code/proj/particle_advection.cxx:21:0:
/home/users/roba/manyCore/vtkm_code/proj/EulerInteg.h: In member function ‘void vtkm::worklet::Euler::Run(const CartesianArrayHandle&, const ScalerHandle&)’:
/home/users/roba/manyCore/vtkm_code/proj/EulerInteg.h:132:25: error: request for member ‘Invoke’ in ‘vtkm::worklet::EvaluateDispatcher’, which is of non-class type ‘vtkm::worklet::DispatcherMapField<vtkm::worklet::Euler::EvaluateVectorFieldAtLocation>(vtkm::worklet::Euler::EvaluateVectorFieldAtLocation)’
      EvaluateDispatcher.Invoke(inField,nextPt);
                         ^
make[2]: *** [CMakeFiles/particle_advection.dir/particle_advection.cxx.o] Error 1
make[1]: *** [CMakeFiles/particle_advection.dir/all] Error 2