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

2014 6 4
2 个回答
回答已采纳
更新时间：2014 6 6
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0 个投票

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.

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 采纳的回答

Sébastien MAILFERT
编辑：Sébastien MAILFERT 2014-6-4

0 个投票

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

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Titus Edelhofer
Titus Edelhofer 2014-6-4
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 ...
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
Titus Edelhofer 2014-6-4
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?
Dear Titus, this solved my problem! I can know run my executable file with Java without Matlab :-) Thanks for your precious hep. Bests Sébastien

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更多回答（1 个）

Titus Edelhofer
Titus Edelhofer 2014-6-4

0 个投票

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

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