[firedrake] Error - NonlinearVariationalSolver

[Anna Kalogirou]

Dear all,

I wrote the attached simple code to solve a shallow water problem with a 
nonlinear solver, but I get the following error (note that the linear 
problem works fine). Can someone help me and see what I am doing wrong? 
Thanks you very much!

Kind regards,

Anna Kalogirou.

===================================

Traceback (most recent call last):
   File "nonlinear_swe.py", line 43, in <module>
     phi_solver = NonlinearVariationalSolver(phi_problem)
   File 
"/opt/firedrake/2.0/lib/python2.7/site-packages/firedrake/solving.py", 
line 123, in __init__
     self._jac_tensor = assemble(self._problem.J_ufl, bcs=self._problem.bcs)
   File 
"/opt/firedrake/2.0/lib/python2.7/site-packages/firedrake/solving.py", 
line 420, in assemble
     return _assemble(f, tensor=tensor, bcs=_extract_bcs(bcs))
   File 
"/opt/firedrake/2.0/lib/python2.7/site-packages/firedrake/solving.py", 
line 439, in _assemble
     kernels = ffc_interface.compile_form(f, "form")
   File 
"/opt/firedrake/2.0/lib/python2.7/site-packages/firedrake/ffc_interface.py", 
line 235, in compile_form
     FFCKernel(form, name).kernels)]
   File 
"/opt/firedrake/2.0/lib/python2.7/site-packages/PyOP2-0.11.0_117_gcfe592d-py2.7-linux-x86_64.egg/pyop2/caching.py", 
line 202, in __new__
     obj = make_obj()
   File 
"/opt/firedrake/2.0/lib/python2.7/site-packages/PyOP2-0.11.0_117_gcfe592d-py2.7-linux-x86_64.egg/pyop2/caching.py", 
line 192, in make_obj
     obj.__init__(*args, **kwargs)
   File 
"/opt/firedrake/2.0/lib/python2.7/site-packages/firedrake/ffc_interface.py", 
line 181, in __init__
     ffc_tree = ffc_compile_form(form, prefix=name, 
parameters=parameters["form_compiler"])
   File 
"/opt/firedrake/2.0/lib/python2.7/site-packages/ffc/compiler.py", line 
151, in compile_form
     analysis = analyze_forms(forms, parameters)
   File 
"/opt/firedrake/2.0/lib/python2.7/site-packages/ffc/analysis.py", line 
57, in analyze_forms
     parameters) for form in forms)
   File 
"/opt/firedrake/2.0/lib/python2.7/site-packages/ffc/analysis.py", line 
57, in <genexpr>
     parameters) for form in forms)
   File 
"/opt/firedrake/2.0/lib/python2.7/site-packages/ffc/analysis.py", line 
136, in _analyze_form
     _attach_integral_metadata(form_data, parameters)
   File 
"/opt/firedrake/2.0/lib/python2.7/site-packages/ffc/analysis.py", line 
266, in _attach_integral_metadata
     scheme = quad_schemes[0]
IndexError: list index out of range

===================================

-- 
  
  Dr Anna Kalogirou
  Research Fellow
  School of Mathematics
  University of Leeds

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