# Helmholtz/complex/xdmf contains zeros only **URL:** \ **Category:** dolfinx\ **Created:** [July 9, 2021, 6:49am UTC](https://fenicsproject.discourse.group/t/helmholtz-complex-xdmf-contains-zeros-only/6204 "2021-07-09T06:49:34Z")\ **Posts on this page:** 8\ **Page:** 2
**Author:** ![dparsons](https://avatars.discourse-cdn.com/v4/letter/d/5e9695/32.png) [@dparsons](https://fenicsproject.discourse.group/u/dparsons)\ **Post date:** [April 4, 2022, 12:34am UTC](https://fenicsproject.discourse.group/t/helmholtz-complex-xdmf-contains-zeros-only/6204/21 "2022-04-04T00:34:24Z")
What is returned by ```auto dpkg -l libpetsc-complex*-dev python3-dolfinx* | cat ``` What is shown by ```auto cat /etc/os-release ``` What is the output of ```auto PETSC_DIR=/usr/lib/petscdir/petsc-complex python3 -c "import dolfinx; print(dolfinx. __path__ ); print(dolfinx.has_petsc_complex)" ``` ```auto ``` ---
**Author:** ![MPenaR](https://yyz2.discourse-cdn.com/free1/user_avatar/fenicsproject.discourse.group/mpenar/32/2985_2.png) [@MPenaR](https://fenicsproject.discourse.group/u/MPenaR)\ **Post date:** [April 4, 2022, 11:11am UTC](https://fenicsproject.discourse.group/t/helmholtz-complex-xdmf-contains-zeros-only/6204/22 "2022-04-04T11:11:17Z")
Sorry for the language of my machine, I can translate the headers if you need it: ```auto dpkg -l libpetsc-complex*-dev python3-dolfinx* | cat ``` ```auto Deseado=desconocido(U)/Instalar/eliminaR/Purgar/retener(H) | Estado=No/Inst/ficheros-Conf/desempaqUetado/medio-conF/medio-inst(H)/espera-disparo(W)/pendienTe-disparo |/ Err?=(ninguno)/requiere-Reinst (Estado,Err: mayúsc.=malo) ||/ Nombre Versión Arquitectura Descripción +++-==============================-=================-============-============================================================= un libpetsc-complex-3.6.2-dev (no hay ninguna descripción disponible) un libpetsc-complex-3.6.3-dev (no hay ninguna descripción disponible) ii libpetsc-complex-dev 3.16.5+dfsg1-1 all Virtual package depending on latest PETSc development package ii libpetsc-complex3.14-dev:amd64 3.14.5+dfsg1-4 amd64 Static libraries, shared links, header files for PETSc rc libpetsc-complex3.15-dev:amd64 3.15.5+dfsg1-1+b2 amd64 Static libraries, shared links, header files for PETSc ii libpetsc-complex3.16-dev:amd64 3.16.5+dfsg1-1 amd64 Static libraries, shared links, header files for PETSc ii python3-dolfinx:amd64 1:0.3.0-14 amd64 Python interface for DOLFIN (Python 3) ii python3-dolfinx-complex 1:0.3.0-14 amd64 Python interface for DOLFIN (Python 3) ii python3-dolfinx-real 1:0.3.0-14 amd64 Python interface for DOLFIN (Python 3) ``` ```auto cat /etc/os-release ``` ```auto PRETTY_NAME="Debian GNU/Linux bookworm/sid" NAME="Debian GNU/Linux" ID=debian HOME_URL="https://www.debian.org/" SUPPORT_URL="https://www.debian.org/support" BUG_REPORT_URL="https://bugs.debian.org/" ``` ```auto PETSC_DIR=/usr/lib/petscdir/petsc-complex python3 -c "import dolfinx; print(dolfinx. __path__ ); print(dolfinx.has_petsc_complex)" ``` ```auto Traceback (most recent call last): File "", line 1, in File "/usr/lib/petscdir/petsc-complex/lib/python3/dist-packages/dolfinx/ __init__.py", line 45, in from .fem.form import Form File "/usr/lib/petscdir/petsc-complex/lib/python3/dist-packages/dolfinx/fem/ __init__.py", line 10, in from dolfinx.fem.assemble import (apply_lifting, apply_lifting_nest, File "/usr/lib/petscdir/petsc-complex/lib/python3/dist-packages/dolfinx/fem/assemble.py", line 16, in from dolfinx.fem.dirichletbc import DirichletBC File "/usr/lib/petscdir/petsc-complex/lib/python3/dist-packages/dolfinx/fem/dirichletbc.py", line 19, in from dolfinx.fem.function import Function, FunctionSpace File "/usr/lib/petscdir/petsc-complex/lib/python3/dist-packages/dolfinx/fem/function.py", line 16, in from dolfinx import common, cpp, jit File "/usr/lib/petscdir/petsc-complex/lib/python3/dist-packages/dolfinx/jit.py", line 28, in raise RuntimeError("Could not find DOLFINx pkg-config file. Make sure appropriate paths are set.") RuntimeError: Could not find DOLFINx pkg-config file. Make sure appropriate paths are set. ``` ---
**Author:** ![dparsons](https://avatars.discourse-cdn.com/v4/letter/d/5e9695/32.png) [@dparsons](https://fenicsproject.discourse.group/u/dparsons)\ **Post date:** [April 4, 2022, 1:00pm UTC](https://fenicsproject.discourse.group/t/helmholtz-complex-xdmf-contains-zeros-only/6204/23 "2022-04-04T13:00:07Z")
Those pieces look correct. Can you now report ```auto dpkg -l pkg-config *dolfinx* | cat ``` and ```auto ls -l /usr/lib/petscdir/petsc-complex /etc/alternatives/petsc-complex ``` ---
**Author:** ![MPenaR](https://yyz2.discourse-cdn.com/free1/user_avatar/fenicsproject.discourse.group/mpenar/32/2985_2.png) [@MPenaR](https://fenicsproject.discourse.group/u/MPenaR)\ **Post date:** [April 4, 2022, 2:02pm UTC](https://fenicsproject.discourse.group/t/helmholtz-complex-xdmf-contains-zeros-only/6204/24 "2022-04-04T14:02:37Z")
sure! (thank you very much btw) ```auto dpkg -l pkg-config *dolfinx* | cat ``` ```auto dpkg-query: no se ha encontrado ningún paquete que corresponda con dolfinx. Deseado=desconocido(U)/Instalar/eliminaR/Purgar/retener(H) | Estado=No/Inst/ficheros-Conf/desempaqUetado/medio-conF/medio-inst(H)/espera-disparo(W)/pendienTe-disparo |/ Err?=(ninguno)/requiere-Reinst (Estado,Err: mayúsc.=malo) ||/ Nombre Versión Arquitectura Descripción +++-==============-============-============-=========================================== ii pkg-config 0.29.2-1 amd64 manage compile and link flags for libraries ``` and ```auto ls -l /usr/lib/petscdir/petsc-complex /etc/alternatives/petsc-complex ``` ```auto lrwxrwxrwx 1 root root 52 mar 21 19:57 /etc/alternatives/petsc-complex -> /usr/lib/petscdir/petsc3.16/x86_64-linux-gnu-complex lrwxrwxrwx 1 root root 31 oct 8 04:33 /usr/lib/petscdir/petsc-complex -> /etc/alternatives/petsc-complex ``` ```auto ``` ---
**Author:** ![dparsons](https://avatars.discourse-cdn.com/v4/letter/d/5e9695/32.png) [@dparsons](https://fenicsproject.discourse.group/u/dparsons)\ **Post date:** [April 4, 2022, 3:42pm UTC](https://fenicsproject.discourse.group/t/helmholtz-complex-xdmf-contains-zeros-only/6204/25 "2022-04-04T15:42:51Z")
> [@MPenaR](#): > > `no se ha encontrado ningún paquete que corresponda con dolfinx` Eh, I wasn’t specific enough. Give me ```auto dpkg -l pkg-config "*dolfinx*" | cat ``` ---
**Author:** ![MPenaR](https://yyz2.discourse-cdn.com/free1/user_avatar/fenicsproject.discourse.group/mpenar/32/2985_2.png) [@MPenaR](https://fenicsproject.discourse.group/u/MPenaR)\ **Post date:** [April 4, 2022, 3:47pm UTC](https://fenicsproject.discourse.group/t/helmholtz-complex-xdmf-contains-zeros-only/6204/26 "2022-04-04T15:47:31Z")
> [@dparsons](#): > > `dpkg -l pkg-config "*dolfinx*" | cat` Deseado=desconocido(U)/Instalar/eliminaR/Purgar/retener(H) | Estado=No/Inst/ficheros-Conf/desempaqUetado/medio-conF/medio-inst(H)/espera-disparo(W)/pendienTe-disparo |/ Err?=(ninguno)/requiere-Reinst (Estado,Err: mayúsc.=malo) ||/ Nombre Versión Arquitectura Descripción ++±==============================-==============================-============-======================================================= ii dolfinx-doc 1:0.3.0-14 all Documentation and demo programs for DOLFIN un libdolfinx-complex-dev (no hay ninguna descripción disponible) ii libdolfinx-complex0.3:amd64 1:0.3.0-14 amd64 Shared libraries for DOLFIN ii libdolfinx-complex2019.2:amd64 2019.2.0~git20210130.c14cb0a-5 amd64 Shared libraries for DOLFIN ii libdolfinx-dev:amd64 1:0.3.0-14 amd64 Shared links and header files for DOLFIN ii libdolfinx-real-dev:amd64 1:0.3.0-14 amd64 Shared links and header files for DOLFIN (real numbers) ii libdolfinx-real0.3:amd64 1:0.3.0-14 amd64 Shared libraries for DOLFIN ii pkg-config 0.29.2-1 amd64 manage compile and link flags for libraries ii python3-dolfinx:amd64 1:0.3.0-14 amd64 Python interface for DOLFIN (Python 3) ii python3-dolfinx-complex 1:0.3.0-14 amd64 Python interface for DOLFIN (Python 3) ii python3-dolfinx-real 1:0.3.0-14 amd64 Python interface for DOLFIN (Python 3) ---
**Author:** ![dparsons](https://avatars.discourse-cdn.com/v4/letter/d/5e9695/32.png) [@dparsons](https://fenicsproject.discourse.group/u/dparsons)\ **Post date:** [April 4, 2022, 3:55pm UTC](https://fenicsproject.discourse.group/t/helmholtz-complex-xdmf-contains-zeros-only/6204/27 "2022-04-04T15:55:27Z")
> [@MPenaR](#): > > un libdolfinx-complex-dev (no hay ninguna descripción disponible) ok, this is the problem. You’ll need to install it. I’ll have to inspect why it’s not getting installed automatically with python3-dolfinx-complex ---
**Author:** ![MPenaR](https://yyz2.discourse-cdn.com/free1/user_avatar/fenicsproject.discourse.group/mpenar/32/2985_2.png) [@MPenaR](https://fenicsproject.discourse.group/u/MPenaR)\ **Post date:** [April 4, 2022, 4:34pm UTC](https://fenicsproject.discourse.group/t/helmholtz-complex-xdmf-contains-zeros-only/6204/28 "2022-04-04T16:34:18Z")
Thank you very much, it works now. Finally, after many months of reading that the complex solver is much more efficient that the real one for cases like the Helmholtz equation, now I can test it by myself!! [Previous page](https://fenicsproject.discourse.group/t/helmholtz-complex-xdmf-contains-zeros-only/6204.md?page=1)