Dear Nektar community,

After I installed Nektar4.4.1 in my Ubuntu (18.04) by source code,

I successfully run the two examples (1D Advection equ and 2D Helmholtz problem) in User guide, Chapter 6.

But when I tried the third example (AdvectionDiffusion.xml, in 6.4.3 Advection dominated mass transport in a pipe), I bumped into a segmentation error.

I am a newbie in Nektar, So I could not find which one is a problem in the input xml file.

Could you give me an idea to solve the problem?

I really want to learn Nektar.

Thank you.

Dongmyung Suh

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T5500:~/Desktop/Nektar_exercise/AdvectionDiffusion$ ADRSolver AdvectionDiffusion.xml

Warning: Level 0 assertion violation

Using Default variable expansion definition for field: u

[T5500:03146] *** Process received signal ***

[T5500:03146] Signal: Segmentation fault (11)

[T5500:03146] Signal code: Address not mapped (1)

[T5500:03146] Failing at address: 0x8

[T5500:03146] [ 0] /lib/x86_64-linux-gnu/libc.so.6(+0x3ef20)[0x7fbe5b148f20]

[T5500:03146] [ 1] /home/dongmyung/Software/nektar++-4.4.1/build/dist/lib64/nektar++-4.4.1/libSolverUtils.so.4.4.1(_ZN6Nektar11SolverUtils14UnsteadySystem17v_GenerateSummaryERSt6vectorISt4pairINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEES9_ESaISA_EE+0x28f)[0x7fbe5e33f9af]

[T5500:03146] [ 2] /home/dongmyung/Software/nektar++-4.4.1/build/dist/lib64/nektar++-4.4.1/libSolverUtils.so.4.4.1(_ZN6Nektar11SolverUtils14DriverStandard9v_ExecuteERSo+0x4a4)[0x7fbe5e2e3b14]

[T5500:03146] [ 3] ADRSolver(main+0x177)[0x55d5de973037]

[T5500:03146] [ 4] /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xe7)[0x7fbe5b12bb97]

[T5500:03146] [ 5] ADRSolver(_start+0x2a)[0x55d5de98329a]

[T5500:03146] *** End of error message ***

Segmentation fault (core dumped)

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