flow123d_version: 2.0.0
problem: !Coupling_Sequential
  description: Invalid YAML format - missing bracket of balance record
  mesh:
    mesh_file: ../00_mesh/cube_1x1x1_frac21_shift.msh
  flow_equation: !Flow_Darcy_LMH
    nonlinear_solver:
      linear_solver: !Petsc
        a_tol: 1.0e-07
### ERROR missing end bracket
    balance: {
    output_stream: 
      file: ./small_cube.pvd