# Dolfinx install problem **URL:** \ **Category:** dolfinx\ **Created:** [October 8, 2021, 3:18am UTC](https://fenicsproject.discourse.group/t/dolfinx-install-problem/6780 "2021-10-08T03:18:45Z")\ **Posts on this page:** 10\ **Page:** 1
**Author:** ![wwshunan](https://yyz2.discourse-cdn.com/free1/user_avatar/fenicsproject.discourse.group/wwshunan/32/852_2.png) [@wwshunan](https://fenicsproject.discourse.group/u/wwshunan)\ **Post date:** [October 8, 2021, 3:18am UTC](https://fenicsproject.discourse.group/t/dolfinx-install-problem/6780/1 "2021-10-08T03:18:45Z")
Hi all, I tried to install dolfinx and have successfully installed complex petsc. An error was reported when I tried to install dolfinx package: ```auto -- Check size of PetscInt -- Check size of PetscInt - failed -- Looking for PETSC_USE_COMPLEX -- Looking for PETSC_USE_COMPLEX - not found ``` Thank you in advance for any help. ---
**Author:** ![dokken](https://yyz2.discourse-cdn.com/free1/user_avatar/fenicsproject.discourse.group/dokken/32/1560_2.png) [@dokken](https://fenicsproject.discourse.group/u/dokken)\ **Post date:** [October 8, 2021, 4:36am UTC](https://fenicsproject.discourse.group/t/dolfinx-install-problem/6780/2 "2021-10-08T04:36:12Z")
You Need to supply more information about the installation. How Did you install petsc? What is $PETSC\_DIR and $PETSC\_ARCH Set to? ---
**Author:** ![wwshunan](https://yyz2.discourse-cdn.com/free1/user_avatar/fenicsproject.discourse.group/wwshunan/32/852_2.png) [@wwshunan](https://fenicsproject.discourse.group/u/wwshunan)\ **Post date:** [October 8, 2021, 7:03am UTC](https://fenicsproject.discourse.group/t/dolfinx-install-problem/6780/3 "2021-10-08T07:03:54Z")
dokken, I have installed petsc with the following method, `1. python3 ./configure --COPTFLAGS="${PETSC_SLEPC_OPTFLAGS}" --CXXOPTFLAGS="${PETSC_SLEPC_OPTFLAGS}" --FOPTFLAGS="${PETSC_SLEPC_OPTFLAGS}" --with-make-np=${PETSC_SLEPC_MAKE_NP} --with-64-bit-indices=no --with-debugging=${PETSC_SLEPC_DEBUGGING} --with-fortran-bindings=no --with-shared-libraries --download-hypre --download-metis --download-mumps --download-ptscotch --download-scalapack --download-suitesparse --download-superlu --download-superlu_dist --with-scalar-type=complex --download-cmake` Its result, ```auto PETSc: PETSC_ARCH: linux-gnu-complex-32 PETSC_DIR: /usr/local/petsc Prefix: Scalar type: complex Precision: double Support for __float128 Integer size: 4 bytes Single library: yes Shared libraries: yes Memory alignment from malloc(): 16 bytes Using GNU make: /usr/bin/make xxx=========================================================================xxx Configure stage complete. Now build PETSc libraries with: make PETSC_DIR=/usr/local/petsc PETSC_ARCH=linux-gnu-complex-32 all xxx=========================================================================xxx ``` ```auto 2. sudo make PETSC_DIR=/usr/local/petsc PETSC_ARCH=linux-gn u-complex-32 all ``` Its result, ```auto CC linux-gnu-complex-32/obj/mat/order/amd/amd.o CC linux-gnu-complex-32/obj/mat/impls/aij/mpi/mumps/mumps.o CC linux-gnu-complex-32/obj/dm/impls/da/hypre/mhyp.o CC linux-gnu-complex-32/obj/ksp/pc/impls/hypre/hypre.o CLINKER linux-gnu-complex-32/lib/libpetsc.so.3.16.0 ========================================= Now to check if the libraries are working do: make PETSC_DIR=/usr/local/petsc PETSC_ARCH=linux-gnu-complex-32 check ``` $PETSC\_DIR=/usr/local/petsc and $PETSC\_ARCH=linux-gnu-complex-32 I found a similar report at this link [cmake problem finding SLEPc: needs link to mpi · Issue #715 · FEniCS/dolfinx (github.com)](https://github.com/FEniCS/dolfinx/issues/715) ---
**Author:** ![dokken](https://yyz2.discourse-cdn.com/free1/user_avatar/fenicsproject.discourse.group/dokken/32/1560_2.png) [@dokken](https://fenicsproject.discourse.group/u/dokken)\ **Post date:** [October 8, 2021, 7:33am UTC](https://fenicsproject.discourse.group/t/dolfinx-install-problem/6780/4 "2021-10-08T07:33:40Z")
Have you exported PETSC\_DIR and PETSC\_ARCH as environment variables? What happens if you call ```auto echo $PETSC_DIR echo $PETSC_ARCH ``` ---
**Author:** ![wwshunan](https://yyz2.discourse-cdn.com/free1/user_avatar/fenicsproject.discourse.group/wwshunan/32/852_2.png) [@wwshunan](https://fenicsproject.discourse.group/u/wwshunan)\ **Post date:** [October 8, 2021, 7:39am UTC](https://fenicsproject.discourse.group/t/dolfinx-install-problem/6780/5 "2021-10-08T07:39:55Z")
The echo results are /usr/local/petsc and linux-gnu-complex-32 respective. Now I used pip3 install . rather than sudo -E pip3 install ., and it works. I’ll test if I can import dolfinx. ---
**Author:** ![wwshunan](https://yyz2.discourse-cdn.com/free1/user_avatar/fenicsproject.discourse.group/wwshunan/32/852_2.png) [@wwshunan](https://fenicsproject.discourse.group/u/wwshunan)\ **Post date:** [October 8, 2021, 8:08am UTC](https://fenicsproject.discourse.group/t/dolfinx-install-problem/6780/6 "2021-10-08T08:08:46Z")
Dear dokken, Another error occurs when I import dolfinx and the message is, ```auto In [1]: import dolfinx --------------------------------------------------------------------------- TypeError Traceback (most recent call last) in ----> 1 import dolfinx ~/.local/lib/python3.8/site-packages/dolfinx/ __init__.py in 43 from .cpp.mesh import Topology, Geometry 44 ---> 45 from .fem.form import Form 46 from .fem.dirichletbc import DirichletBC 47 from .fem import (FunctionSpace, VectorFunctionSpace, ~/.local/lib/python3.8/site-packages/dolfinx/fem/ __init__.py in 8 9 from dolfinx.cpp.fem import IntegralType ---> 10 from dolfinx.fem.assemble import (apply_lifting, apply_lifting_nest, 11 assemble_matrix, assemble_matrix_block, 12 assemble_matrix_nest, assemble_scalar, ~/.local/lib/python3.8/site-packages/dolfinx/fem/assemble.py in 34 35 form_type = typing.Union[Form, cpp.fem.Form, ufl.Form, ---> 36 collections.abc.Sequence[Form], 37 collections.abc.Sequence[cpp.fem.Form], 38 collections.abc.Sequence[ufl.Form]] TypeError: 'ABCMeta' object is not subscriptable ``` Does the source code have bug? ---
**Author:** ![dokken](https://yyz2.discourse-cdn.com/free1/user_avatar/fenicsproject.discourse.group/dokken/32/1560_2.png) [@dokken](https://fenicsproject.discourse.group/u/dokken)\ **Post date:** [October 8, 2021, 8:11am UTC](https://fenicsproject.discourse.group/t/dolfinx-install-problem/6780/7 "2021-10-08T08:11:54Z")
This has recently been fixed (as of 12 hours ago), [Tweaks for building wheels by jhale · Pull Request #1740 · FEniCS/dolfinx · GitHub](https://github.com/FEniCS/dolfinx/pull/1740/files) ---
**Author:** ![wwshunan](https://yyz2.discourse-cdn.com/free1/user_avatar/fenicsproject.discourse.group/wwshunan/32/852_2.png) [@wwshunan](https://fenicsproject.discourse.group/u/wwshunan)\ **Post date:** [October 8, 2021, 9:25am UTC](https://fenicsproject.discourse.group/t/dolfinx-install-problem/6780/8 "2021-10-08T09:25:34Z")
Dear dokken, Thank you very much. Since I used a dolfinx branch, another error occurred ```auto Traceback (most recent call last): File "mesh.py", line 55, in mesh, cell_tags, facet_tags = gmsh_model_to_mesh( File "/mnt/d/Workspace/fenics/return-stroke/test/gmsh_helpers.py", line 133, in gmsh_model_to_mesh facet_type = cell_entity_type(to_type(str(ufl_domain.ufl_cell())), TypeError: cell_entity_type(): incompatible function arguments. The following argument types are supported: 1. (arg0: dolfinx.cpp.mesh.CellType, arg1: int, arg2: int) -> dolfinx.cpp.mesh.CellType Invoked with: , 1 ``` Do you have any method to solve it? ---
**Author:** ![dokken](https://yyz2.discourse-cdn.com/free1/user_avatar/fenicsproject.discourse.group/dokken/32/1560_2.png) [@dokken](https://fenicsproject.discourse.group/u/dokken)\ **Post date:** [October 8, 2021, 9:48am UTC](https://fenicsproject.discourse.group/t/dolfinx-install-problem/6780/9 "2021-10-08T09:48:07Z")
Change the input of cell\_entity\_type to ```auto # FIXME: Last argument is 0 as all facets are the same for tetrahedra facet_type = cell_entity_type(to_type(str(ufl_domain.ufl_cell())), fdim, 0) ``` as shown in [https://jorgensd.github.io/dolfinx-tutorial/chapter2/ns\_code2.html?highlight=cell\_entity\_type](https://jorgensd.github.io/dolfinx-tutorial/chapter2/ns_code2.html?highlight=cell_entity_type) ---
**Author:** ![wwshunan](https://yyz2.discourse-cdn.com/free1/user_avatar/fenicsproject.discourse.group/wwshunan/32/852_2.png) [@wwshunan](https://fenicsproject.discourse.group/u/wwshunan)\ **Post date:** [October 8, 2021, 12:11pm UTC](https://fenicsproject.discourse.group/t/dolfinx-install-problem/6780/10 "2021-10-08T12:11:30Z")
Now dolfinx can successfully run. Thank you again.