[fertinaz]

Hi all. This is not directly a problem related with openfoam programming but might still be interesting for OF developers.

I am trying to develop a gui using qt that runs openfoam behind. tried to call simpleFoam using qprocess:

solverProcess = new QProcess(this);

solverBin = "/OF_APPBIN/simpleFoam";

testDir = "/fullPathTestDir";
args << "-case" << testDir;

solverProcess->start(solverBin, args);

    if (solverProcess->waitForStarted())
        // done

This code does not produce any errors and ends successfully however runs nothing. When I use startDetached instead of start I get the following interesting err msg:

simpleFoam: error while loading shared libraries: libincompressibleRASModels.so: cannot open shared object file: No such file or directory

There is nothing wrong with the full path of the solver and test directory. I printed their values and could run manually on a terminal without any problems.

The test case is pitzDaily. I am using (still) OF 1.6.x on an Ubuntu machine.

Any help is appreciated.

[wyldckat]

Very quick answer:

1. Advanced tips for working with the OpenFOAM shell environment
2. http://qt-project.org/doc/qt-4.8/qpr...essEnvironment

[fertinaz]

I checked the links above. not much new to me, but they're quite useful. thanks.

I moved the installation of Openfoam from my home directory to /opt and changed the code a little bit. It seems to work now. However I don't want to do it this way. Here is the new code snippet:

solverProcess->setStandardOutputFile("/myTestDir/test.out", QIODevice::Append);

solverProcess->start("/bin/sh", QStringList() << "/myTestDir/test.sh");

if (solverProcess->waitForStarted()) {
  if (m_SolverProcess->state() == QProcess::Running) {
    QMessageBox::information(NULL, "runSolver", "Done");
  }
}

As you see instead of a direct call for the openfoam solver, I run a shell script where the call for the solver is included:

#!/bin/bash

echo "some messages"

source openfoam

echo "Check isSourced successfully: "
echo $WM_PROJECT_DIR

/FOAM_APPBIN/simpleFoam -case /myTestDir > /myTestDir/log

This method works perfectly fine.

However if I try to call simpleFoam directly using qprocess as in the very first post, I get the following err msg:

qDebug() << "STDERR: " << m_SolverProcess->readAllStandardError();
STDERR: /FOAM_APPBIN/simpleFoam:
             error while loading shared libraries:
             libincompressibleTurbulenceModel.so:
             cannot open shared object file: No such file or directory

This is somehow related to assigning environment variables correctly I presume. I must be doing sth wrong somewhere. The code below does not run as well:

QProcessEnvironment env = QProcessEnvironment::systemEnvironment();

env.insert("PATH", 
          env.value("Path")+openfoamPath+"/platforms/"+openfoamArch+"/bin/");

solverProcess->setProcessEnvironment(env);
solverProcess->start("simpleFoam -case /fullPathTestDir/");

I can’t seem to understand how to deal with the error "error while loading shared libraries: libincompressibleTurbulenceModel.so: cannot open shared object file".

Any ideas are very welcome.

Note: OpenFoam is sourced by default in .bashrc

[Jakob1]

Hey fertinaz,
can t help you with your specific problem, but do you know about PyFoam? Let s you handle Foaming in a Python environment. I used that to write a simple GUI (with wx, but you can just as well use qt) and some control/analysis functions. Works really nicely.

[wyldckat]

Greetings to all!

@Fatih: on Linux/POSIX systems, usually it's case-sensitive, where "PATH" and "Path" are not the thing.

In addition, there are several environment variables that are modified and added when the OpenFOAM environment is sourced into the shell environment. Try this:

1. Comment out the line in ".bashrc" related to OpenFOAM.
2. Start a new terminal.
3. Run:
   

   export > environment.before.txt

4. Activate the OpenFOAM environment (run the original string you had in ".bashrc").
5. Run:
   

   export > environment.after.txt

6. And compare the two files. You can use diff:
   

   diff -Nur environment.before.txt environment.after.txt

Best regards,
Bruno

[JVRS]

Hello,
Did you managed to solve that problem?
I'm also facing the same type of problem.
I want to run a solver through a pushbutton on qt and it doen's start.
If I type the command on the commandline it works perfectly.
Don't know how to solve this...
If you managed to solve this please let me know how...

regards,
Jsousa