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There are no Solvers in the System

Posted: 14 Oct 2020, 14:11
by mintento
Hi, I am very new to Elmer and I am trying to simulate a heat transfer process on a brick wall with conduction, convection, and radiation. However, this error appeared on the Solver Log (attached below).

What should I do? I tried searching this error on the Forum's search bar and as far as I know there are no forum with this error return.

Any help is appreciated. Thank you very much

ELMER SOLVER (v 8.4) STARTED AT: 2020/10/14 18:02:58
ParCommInit: Initialize #PEs: 1
MAIN:
MAIN: =============================================================
MAIN: ElmerSolver finite element software, Welcome!
MAIN: This program is free software licensed under (L)GPL
MAIN: Copyright 1st April 1995 - , CSC - IT Center for Science Ltd.
MAIN: Webpage http://www.csc.fi/elmer, Email elmeradm@csc.fi
MAIN: Version: 8.4 (Rev: Release, Compiled: 2020-08-03)
MAIN: Running one task without MPI parallelization.
MAIN: Running with just one thread per task.
MAIN: Lua interpreted linked in.
MAIN: =============================================================

LoadInputFile: Reading only "Run Control" section

MAIN:
MAIN:
MAIN: -------------------------------------
MAIN: Reading Model: case.sif

LoadInputFile: Scanning input file: case.sif
LoadInputFile: Scanning only size info
LoadInputFile: First time visiting
LoadInputFile: Reading base load of sif file
LoadInputFile: Loading input file: case.sif
LoadInputFile: Reading base load of sif file
LoadInputFile: Number of BCs: 2
LoadInputFile: Number of Body Forces: 0
LoadInputFile: Number of Initial Conditions: 1
LoadInputFile: Number of Materials: 1
LoadInputFile: Number of Equations: 1
ERROR:: LoadInputFile: There are no Solvers in the system!

STOP 1

Re: There are no Solvers in the System

Posted: 15 Oct 2020, 01:38
by kevinarden
need to post your sif file and if possible your mesh
search this forum, this solution has appeared many times.

Re: There are no Solvers in the System

Posted: 15 Oct 2020, 05:34
by mintento
Dear Kevin,

Here is my .sif file.

What keywords should I use to find said solutions? Thank you very much

Re: There are no Solvers in the System

Posted: 15 Oct 2020, 09:17
by gagliar
Hello,
In section "Equation 1", there is no solver indicated!
You should have a line of that type in this section

Active Solvers (1)= 1

But also you should have at least one solver section which tells which equation you are solving!

See examples in /elmerfem/fem/tests of the source code.

Regards,
Olivier

Re: There are no Solvers in the System

Posted: 15 Oct 2020, 13:00
by kevinarden
If you are building the sif with ElmerGUI you need to check the active solver box when you create an equation.

try doing some of the Elmer tutorial files

https://www.nic.funet.fi/pub/sci/physics/elmer/doc/