Dear Bruno,
  Thank you for your help! I added physical groups for volume, surfaces,
curves, and points. But the problem remains the same.  The modified geo
file is attached below.
Best regards,
Yuesu

On Tue, Sep 22, 2020 at 7:55 AM Bruno Turcksin <bruno.turck...@gmail.com>
wrote:

>
> Yuesu,
>
> I had the same problem recently. Our gmsh reader assumes that the user has
> set boundary id and material id to the mesh. It looks like you don't have
> those and so the file is read incorrectly.
>
> Best,
>
> Bruno
> On Tuesday, September 22, 2020 at 2:04:17 AM UTC-4 jinyu...@gmail.com
> wrote:
>
>> Dear all,
>>   I have one problem when I try to input the .msh file with grid_in
>> function. The error message is :
>>
>> *****************************************************************
>>
>> Exception on processing:
>>
>> --------------------------------------------------------
>> An error occurred in line <3139> of file
>> </project/cacds/build/dealii-9.2.0/source/grid/tria.cc> in function
>> static void
>> dealii::internal::TriangulationImplementation::Implementation::create_triangulation(const
>> std::vector<dealii::Point<dim> >&, const std::vector<dealii::CellData<3>,
>> std::allocator<dealii::CellData<3> > >&, const dealii::SubCellData&,
>> dealii::Triangulation<3, spacedim>&) [with int spacedim = 3]
>> The violated condition was:
>>     false
>> Additional information:
>>  *   While trying to assign a boundary indicator to a line: the line
>> with end vertices -1 and 0 does not exist.*
>> --------------------------------------------------------
>>
>> I attached the gmsh .geo file in this email. There is no vertex -1
>> actually. Could you tell me what's wrong with my mesh generation?
>>
>> Thank you very much!
>> Best regards,
>>
>> --
>> Yuesu Jin,
>> Ph.D student,
>> University of Houston,
>> College of Natural Sciences and Mathematics,
>> Department of Earth and Atmospheric Sciences,
>> Houston, Texas 77204-5008
>> 346-404-2062 <(346)%20404-2062>
>>
>> --
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>


-- 
Yuesu Jin,
Ph.D student,
University of Houston,
College of Natural Sciences and Mathematics,
Department of Earth and Atmospheric Sciences,
Houston, Texas 77204-5008
346-404-2062

-- 
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Attachment: tank.geo
Description: Binary data

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