Ubuntu
fenics package

The errors with Ubuntu on Windows 7

Asked by Nguyen Van Dang

Hello,
I am using Ubuntu on Windows 7 with VMware Player. After installing Fenics at the link http://fenicsproject.org/download/ubuntu_details.html#ubuntu-details, I tried to run a demo in /usr/share/dolfin/demo/la/eigenvalue/python and I got following errors. I don't know if Fenics can run with Ubuntu on Windows or if I got any mistakes. Any helps are appreciated.
Thank you very much for your help.

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On Terminal, I typed: nguyenvandang@ubuntu:/usr/share/dolfin/demo/la/eigenvalue/python$ python demo.py
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Errors I got

Calling FFC just-in-time (JIT) compiler, this may take some time.
Traceback (most recent call last):
  File "demo.py", line 29, in <module>
    V = FunctionSpace(mesh, "CG", 1)
  File "/usr/lib/python2.7/dist-packages/dolfin/function/functionspace.py", line 237, in __init__
    FunctionSpaceBase.__init__(self, mesh, element)
  File "/usr/lib/python2.7/dist-packages/dolfin/function/functionspace.py", line 44, in __init__
    ufc_element, ufc_dofmap = jit(self._ufl_element)
  File "/usr/lib/python2.7/dist-packages/dolfin/compilemodules/jit.py", line 47, in mpi_jit
    return local_jit(*args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/dolfin/compilemodules/jit.py", line 114, in jit
    return jit_compile(form, parameters=p, common_cell=common_cell)
  File "/usr/lib/python2.7/dist-packages/ffc/jitcompiler.py", line 62, in jit
    return jit_element(object, parameters)
  File "/usr/lib/python2.7/dist-packages/ffc/jitcompiler.py", line 162, in jit_element
    (compiled_form, module, form_data) = jit_form(form, parameters)
  File "/usr/lib/python2.7/dist-packages/ffc/jitcompiler.py", line 122, in jit_form
    compile_form(preprocessed_form, prefix=jit_object.signature(), parameters=parameters)
  File "/usr/lib/python2.7/dist-packages/ffc/compiler.py", line 160, in compile_form
    format_code(code, wrapper_code, prefix, parameters)
  File "/usr/lib/python2.7/dist-packages/ffc/formatting.py", line 93, in format_code
    _write_file(code_h, prefix, ".h", parameters)
  File "/usr/lib/python2.7/dist-packages/ffc/formatting.py", line 116, in _write_file
    hfile = open(filename, "w")
IOError: [Errno 13] Permission denied: './form_2a847407964b972dd3bae7db1677609d30814b8d.h'

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Ubuntu fenics Edit question
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mycae
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Best mycae (mycae) said : 		#1

I don't know much about fenics/dolphin, but clearly it attempting to write to part of your filesystem outside your user folder. This is disallowed to prevent users from damaging the OS, or rewriting bits of it -- such permission systems are essential to maintain systems stability and security.

Try copying the relevant directories and files into your user's home directory, before executing the program.

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Nguyen Van Dang (dang-1032170) said : 		#2

Thanks mycae, that solved my question.