Read the System Documentation. There are several ways of doing this with OMC:
1. via command line:
   omc script.mos
2. via corba
    runScript("script.mos");

Cheers,
Adrian Pop/

thank you for your good answer
if it is possible i have another question:

Hello
I have a problem in executing an exe file from C# code:
I am working on OpenModelica that is a free open source simulation tool. Final executable result of simulating with OpenModelika is an exe file. Once we have this exe file, we can get the simulation result by double clicking on this file. However to executing truly the program needs a text file called *_init.txt to be along with exe file in the same directory. Executing the exe file generates final result as a *.plt file in the same directory.
Considering the above mentioned situation my problem begins here:
I am trying to execute the exe file programmatically by C# code:
            Process myProc = new Process();
            myProc.StartInfo.FileName = "dir..\\Sinulation.exe";
            myProc.StartInfo.UseShellExecute = true;
            myProc.Start();
executing the exe file with above code don’t generate the *.plt file.
Is it any way to solve this problem?
I will very thankful for any help

You need to set the working directory where the executable should start.
In this working directory the _init.txt file should be present!

See here how to set the working directory:
http://stackoverflow.com/questions/1149 … -directory

Note that there might be additional issues if the process (the .exe) generates
output on standard output or on standard error (these streams needs to be processes).

Cheers,
Adrian Pop/

Thank you for your good answer, i fixed the problem by your good reply:
            Process myProc = new Process();
            ProcessStartInfo _startInfo = new ProcessStartInfo();
            _startInfo.FileName= " dir..\\Sinulation.exe ";
            _startInfo.WorkingDirectory="dir..:\\";
            _startInfo.CreateNoWindow = true;
            myProc.StartInfo = _startInfo;
            myProc.Start();