Run executable file created by Matlab Compiler in Java: error of MCR

Hello,

I'm trying to call my executable file with a Java program. Here are the steps I followed:

1. Compile the package including MCRinstaller.exe on my machine
2. Double click on the package on the host machine: everything is properly installed
3. The program can be run on the host machine without problem
4. ...
5. Call the .exe file from my Java program:

Process exec = Runtime.getRuntime().exe
c("C:\\Users\\cimlUser\\Desktop\\JAVA\\DiffusionLaw\\DiffusionLaw.exe");

The (same) program is not running:

Could you help me to understand why if I launch the exe file directly it works and when I launch it from Java there is an error?

Best regards.

Answer 1

[Sébastien MAILFERT]

Thanks titus for your answer. This should be the answer. You're right, the missing .dll is located there:

C:\Program Files (x86)\MATLAB\MATLAB Compiler Runtime\v715\runtime\win32

I added the following line in my Java code:

java.lang.System.load("C:\\Program Files (x86)\\MATLAB\\MATLAB Compiler Runtime\\v715\\runtime\\win32\\mclmcrrt7_15.dll");

Now, the Java program générâtes an error because the .dll file is a 32bits dll and not a 64bits dll:

Exception in thread "main" java.lang.UnsatisfiedLinkError: C:\Program Files (x86)\MATLAB\MATLAB Compiler Runtime\v715\runtime\win32\mclmcrrt7_15.dll: Can't load IA 32-bit .dll on a AMD 64-bit platform

It's right, the host machine has a 64bits OS. It seems that when I run the executable outside Java, the dll which is called is not the same as when I run it with Java, rigth?

Bests. Sébastien

[Titus Edelhofer]

Hi Sebastien,

take a look here: stackoverflow.

Titus

[Titus Edelhofer]

Hmm, you should not read the dll because the executable needs to load it itself anyway. I would try to add the path as in the last answer of the link I sent, that should help ...

[Sébastien MAILFERT]

You mean this part of code here:

cmd = new String[7];
cmd[0] = "cmd"; 
cmd[1] = "/C";
cmd[2] = "set PATH=C:\\Program Files\\Java\\jdk1.6.0_04\bin";
cmd[3] = "copy " + "\"" +path + "\\" +name+ "\"" + " C:\\java";
cmd[4] = "chdir C:\\java";
cmd[5] = "javac *.java";
cmd[6] = "jar cmf mainClass.txt"+" name"+".jar *.class";
try{
Runtime.getRuntime().exec(cmd);
 }

But I need to point to which file, if you think I should not read the dll. I need only to point to the .exe file, right? Sébastien

[Titus Edelhofer]

Yes, I meant this part. And no, the path should contain the MCR win32 folder. The exe is found because you provide the full path ... Although I'm wondering now: if you start the .exe, the path is known. When you start your java program, somehow (parts) of the path get lost? Any idea why?

[Sébastien MAILFERT]

Dear Titus, this solved my problem! I can know run my executable file with Java without Matlab :-) Thanks for your precious hep. Bests Sébastien

Answer 2

[Titus Edelhofer]

Hi,

my first guess would be, that in your Java program the search path from Windows is not the same, i.e., it's missing the folder c:\program files\matlab\MATLAB Compiler Runtime\v715\runtime\winXY folder...?

Titus