Error in mesh the domain in example 1

[fei1127-CQ]

Hi,
After install the Neper (4.1.2) and FEPX (1.1.1), I try to repeat the example 1 in FEPX. I bulit a simulation.tess through the code in example 1.However, an error appeared during the mesh of the domain as follow:

gof@DESKTOP-9E3S5B6:/mnt/d/CPFM/test$ neper -M simulation.tess -order 2 -rcl 1.25 -part 2
========================    N   e   p   e   r    =======================
Info   : A software package for polycrystal generation and meshing.
Info   : Version 4.1.2
Info   : Built with: gsl|muparser|opengjk|openmp|nlopt
Info   : Running on 12 threads.
Info   : <https://neper.info>
Info   : Copyright (C) 2003-2020, and GNU GPL'd, by Romain Quey.
Info   : No initialization file found (`/home/gof/.neperrc').
Info   : ---------------------------------------------------------------
Info   : MODULE  -M loaded with arguments:
Info   : [ini file] (none)
Info   : [com line] simulation.tess -order 2 -rcl 1.25 -part 2
Info   : ---------------------------------------------------------------
Info   : Reading input data...
Info   :   - Reading arguments...
Error  : Options `-part*' (mesh partitioning) are not available since
         this version of Neper has been built without libscotch.
Aborted (core dumped)

Which version of Neper can be used for this simulation? or is there any other way to solve this problem?

[rquey]

You have to include libscotch at Neper's configuration stage - see the PDF documentation, Section 1.2.

Then you'll see this in Neper's header:

Info   : Built with: gsl|muparser|opengjk|openmp|nlopt|libscotch (full)

[mkasemer]

Indeed, this is an error in Neper due to the fact that you have not built the program with libscotch. For any issues with the program Neper (rather than FEPX), please post in the Neper discussion forum.

[fei1127-CQ]

Thanks for all your helps. I just make it.

[dannypanduro]

Hi fei1127-CQ,

I had a similar issue with not building Neper with libscotch. I solved this by the following steps below.

1.) Make sure you have installed the libscotch dependency. You can do this by typing the following command in your terminal:
$ apt-get install libscotch-dev

I use Ubuntu. If you do too, you would need to type:
$ sudo apt-get install libscotch-dev

2.) Start installing Neper. The key is you need to type "$ cmake .. -DHAVE_LIBCOTCH=ON" instead of just "$ cmake .."

Download and extract Neper source code then:
$ cd neper-4.0.2/src
$ mkdir build
$ cd build
$ cmake .. -DHAVE_LIBSCOTCH=ON
$ make
$ make install

If you used Ubuntu like me, then the code would be:
$ cd neper-4.0.2/src
$ mkdir build
$ cd build
$ cmake .. -DHAVE_LIBSCOTCH=ON
$ sudo make
$ sudo make install

I hope this helps! Cheers!

Richard

[rquey]

Yep. FYI, the next Neper version will include libscotch in its source (but still use the libscotch installed system-wide if available) to make things simpler for everyone here...

[mkasemer]

@RichardPA (and others): For future reference, issues for dependencies are covered in the Neper documentation. As @rquey mentioned in the previous comment, future Neper releases may not require "manual" installation of libscotch and other dependencies, so the documentation is the best source of up-to-date information.

Regarding the usage of sudo (for both Neper and FEPX): Indeed, the sudo command may be necessary when root access is required, though generally this may not be the case. Use when necessary. As a note: installation on shared systems (workstations, clusters) may require root access that is not granted to the general user, and thus you can either 1) request a system administrator to handle the installation or 2) move the neper or fepx to a binary directory located in your specific home directory which you would want to add to your path (e.g., /home/<username>/bin). In the latter case, this binary will likely be accessible only to the user who installed it / has it in their directory.

Again, any issues regarding Neper should be directed to the Neper discussion forum.

[dannypanduro]

Good to hear about the next Neper version. I'm sure that'll be helpful!

@mkasemer, thank you for the explanation on sudo! That makes sense.

[fei1127-CQ]

Thanks for all your helps. I just make it.

[fei1127-CQ]

Yep. FYI, the next Neper version will include libscotch in its source (but still use the libscotch installed system-wide if available) to make things simpler for everyone here...

Waiting for your new version. The program is quite strengthful.