# ParaView Visualizer segmentation fault when starting up
**URL:** https://discourse.paraview.org/t/paraview-visualizer-segmentation-fault-when-starting-up/15317
**Category:** Web Support
**Created:** [August 28, 2024, 5:46pm UTC](https://discourse.paraview.org/t/paraview-visualizer-segmentation-fault-when-starting-up/15317 "2024-08-28T17:46:08Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@tommypope20](https://discourse.paraview.org/u/tommypope20)
#### Post date: [August 28, 2024, 5:46pm UTC](https://discourse.paraview.org/t/paraview-visualizer-segmentation-fault-when-starting-up/15317/1 "2024-08-28T17:46:09Z")
Hi.
I am trying to use ParaView 5.12.0-osmesa on an Ubuntu 22.04 machine. Specifically I am attempting to start the ParaView web visualizer using ‘./pvpython -m paraview.apps.visualizer’. Upon running this command, all that I receive in console is `error: exception occurred: Segmentation fault`
Doing some digging into the Python libraries I find the last function call before the segmentation fault occurs when calling ‘\’
This function is inside of the vtkRemotingViews.so file and I am unable to debug or try to trace the error any further.
I have tried other versions of ParaView including the full 5.12.0 binary as well as 5.10.
I am able to run this exact same ParaView 5.12.0-osmesa visualizer on a seperate linux server with no issues whatsoever, so I’m not sure if I am simply missing some package that needs to be installed? But I have attempted to find a complete list of required dependencies and have been unable to do so.
Any help would be appreciated. Thank you!
---
### Author:  [@jourdain](https://discourse.paraview.org/u/jourdain)
#### Post date: [August 28, 2024, 9:49pm UTC](https://discourse.paraview.org/t/paraview-visualizer-segmentation-fault-when-starting-up/15317/2 "2024-08-28T21:49:08Z")
I do remember something about our ParaView osmesa bundle having an issue. I don’t know if that got fixed, but you should try either 5.11 or 5.13. And nowadays, you can even use the EGL version on a non gpu system.
I think it was the OpenCascade reader that was linking against X or something. @mwestphal may remember the details.
---
### Author:  [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [August 29, 2024, 6:43am UTC](https://discourse.paraview.org/t/paraview-visualizer-segmentation-fault-when-starting-up/15317/3 "2024-08-29T06:43:30Z")
I’m afraid that doesn’t ring a bell, what are you referring too ?
---
### Author:  [@tommypope20](https://discourse.paraview.org/u/tommypope20)
#### Post date: [August 29, 2024, 4:22pm UTC](https://discourse.paraview.org/t/paraview-visualizer-segmentation-fault-when-starting-up/15317/4 "2024-08-29T16:22:50Z")
Thank you for the responses!
Unfortunately after trying ParaView 5.13 and 5.11, I run into the same Segmentation fault error on each of the binaries.
```auto
[lindavsedge1:736765] ***Process received signal***
[lindavsedge1:736765] Signal: Segmentation fault (11)
[lindavsedge1:736765] Signal code: Address not mapped (1)
[lindavsedge1:736765] Failing at address: 0x968
[lindavsedge1:736765] [0] /lib/x86_64-linux-gnu/libc.so.6(+0x42520)[0x7f79eff3d520]
[lindavsedge1:736765] [1] /lib/x86_64-linux-gnu/libX11.so.6(XSync+0x1d)[0x7f79e3ffb74d]
[lindavsedge1:736765] [2] /home/DEV.LOCAL/pope/development/testing/paraview-build/bin/../lib/libvtkRenderingUI-pv5.12.so.1(_ZN26vtkXRenderWindowInteractor10InitializeEv+0xee)[0x7f79e727df0e]
[lindavsedge1:736765] [3] /home/DEV.LOCAL/pope/development/testing/paraview-build/bin/../lib/libvtkRenderingCore-pv5.12.so.1(_ZN15vtkRenderWindow6RenderEv+0x268)[0x7f79e65254c8]
[lindavsedge1:736765] [4] /home/DEV.LOCAL/pope/development/testing/paraview-build/bin/../lib/libvtkRenderingOpenGL2-pv5.12.so.1(_ZN21vtkOpenGLRenderWindow6RenderEv+0xbb)[0x7f79e745467b]
[lindavsedge1:736765] [5] /home/DEV.LOCAL/pope/development/testing/paraview-build/bin/../lib/libvtkRenderingOpenGL2-pv5.12.so.1(_ZN22vtkXOpenGLRenderWindow6RenderEv+0x37)[0x7f79e74fc337]
[lindavsedge1:736765] [6] /home/DEV.LOCAL/pope/development/testing/paraview-build/bin/../lib/libvtkRemotingViews-pv5.12.so.1(_ZN15vtkPVRenderView6RenderEbb+0x9c7)[0x7f79ea1e88a7]
[lindavsedge1:736765] [7] /home/DEV.LOCAL/pope/development/testing/paraview-build/bin/../lib/libvtkRemotingViews-pv5.12.so.1(_ZN15vtkPVRenderView11StillRenderEv+0x79)[0x7f79ea1da8d9]
[lindavsedge1:736765] [8] /home/DEV.LOCAL/pope/development/testing/paraview-build/bin/../lib/libvtkRemotingApplication-pv5.12.so.1(_Z22vtkPVRenderViewCommandP26vtkClientServerInterpreterP13vtkObjectBasePKcRK21vtkClientServerStreamRS5_Pv+0x1bb0)[0x7f79eece9280]
[lindavsedge1:736765] [9] /home/DEV.LOCAL/pope/development/testing/paraview-build/bin/../lib/libvtkRemotingClientServerStream-pv5.12.so.1(_ZN26vtkClientServerInterpreter20ProcessCommandInvokeERK21vtkClientServerStreami+0x4ad)[0x7f79ee14218d]
[lindavsedge1:736765] [10] /home/DEV.LOCAL/pope/development/testing/paraview-build/bin/../lib/libvtkRemotingClientServerStream-pv5.12.so.1(_ZN26vtkClientServerInterpreter17ProcessOneMessageERK21vtkClientServerStreami+0xed)[0x7f79ee1422ed]
[lindavsedge1:736765] [11] /home/DEV.LOCAL/pope/development/testing/paraview-build/bin/../lib/libvtkRemotingClientServerStream-pv5.12.so.1(_ZN26vtkClientServerInterpreter13ProcessStreamERK21vtkClientServerStream+0x7d)[0x7f79ee14289d]
[lindavsedge1:736765] [12] /home/DEV.LOCAL/pope/development/testing/paraview-build/bin/../lib/libvtkRemotingServerManager-pv5.12.so.1(_ZN16vtkPVSessionCore21ExecuteStreamInternalERK21vtkClientServerStreamb+0x157)[0x7f79ee67e607]
[lindavsedge1:736765] [13] /home/DEV.LOCAL/pope/development/testing/paraview-build/bin/../lib/libvtkRemotingServerManager-pv5.12.so.1(_ZN16vtkPVSessionBase13ExecuteStreamEjRK21vtkClientServerStreamb+0x91)[0x7f79ee67c8d1]
[lindavsedge1:736765] [14] /home/DEV.LOCAL/pope/development/testing/paraview-build/bin/../lib/libvtkRemotingViews-pv5.12.so.1(_ZN14vtkSMViewProxy11StillRenderEv+0x1c8)[0x7f79ea2a4358]
[lindavsedge1:736765] [15] /home/DEV.LOCAL/pope/development/testing/paraview-build/lib/python3.10/site-packages/paraview/modules/vtkRemotingViews.so(+0x210495)[0x7f79cdd0f495]
[lindavsedge1:736765] [16] /lib/x86_64-linux-gnu/libpython3.10.so.1.0(+0x128008)[0x7f79ecd3f008]
[lindavsedge1:736765] [17] /lib/x86_64-linux-gnu/libpython3.10.so.1.0(_PyObject_Call+0x5c)[0x7f79eccf8fec]
[lindavsedge1:736765] [18] /lib/x86_64-linux-gnu/libpython3.10.so.1.0(_PyEval_EvalFrameDefault+0x4b16)[0x7f79ecc8d776]
[lindavsedge1:736765] [19] /lib/x86_64-linux-gnu/libpython3.10.so.1.0(+0x1c23af)[0x7f79ecdd93af]
[lindavsedge1:736765] [20] /lib/x86_64-linux-gnu/libpython3.10.so.1.0(+0xe23d8)[0x7f79eccf93d8]
[lindavsedge1:736765] [21] /lib/x86_64-linux-gnu/libpython3.10.so.1.0(_PyEval_EvalFrameDefault+0x9d68)[0x7f79ecc929c8]
[lindavsedge1:736765] [22] /lib/x86_64-linux-gnu/libpython3.10.so.1.0(+0x1c23af)[0x7f79ecdd93af]
[lindavsedge1:736765] [23] /lib/x86_64-linux-gnu/libpython3.10.so.1.0(_PyEval_EvalFrameDefault+0x9d68)[0x7f79ecc929c8]
[lindavsedge1:736765] [24] /lib/x86_64-linux-gnu/libpython3.10.so.1.0(+0x1c23af)[0x7f79ecdd93af]
[lindavsedge1:736765] [25] /lib/x86_64-linux-gnu/libpython3.10.so.1.0(_PyObject_FastCallDictTstate+0xd6)[0x7f79eccf8c76]
[lindavsedge1:736765] [26] /lib/x86_64-linux-gnu/libpython3.10.so.1.0(_PyObject_Call_Prepend+0xe0)[0x7f79eccf8e10]
[lindavsedge1:736765] [27] /lib/x86_64-linux-gnu/libpython3.10.so.1.0(+0x14f0fe)[0x7f79ecd660fe]
[lindavsedge1:736765] [28] /lib/x86_64-linux-gnu/libpython3.10.so.1.0(+0x14388e)[0x7f79ecd5a88e]
[lindavsedge1:736765] [29] /lib/x86_64-linux-gnu/libpython3.10.so.1.0(_PyObject_MakeTpCall+0x8c)[0x7f79eccf6adc]
[lindavsedge1:736765] ***End of error message***
Segmentation fault (core dumped)
```
This is the full error message I am receiving after building ParaView with the debug flags set and running the Visualizer.