Can't load IA 32-bit .dll on a AMD 64-bit platform

Question

I am trying to use SVMLight from Java, using the JNI wrapper on this page:

  static {
    System.loadLibrary(\"lib/JNI_SVM-light-6.01/lib/svmlight\");
  }
         


        

Answer 1

Here is an answer for those who compile from the command line/Command Prompt. It doesn't require changing your Path environment variable; it simply lets you use the 32-bit JVM for the program with the 32-bit DLL.

For the compilation, it shouldn't matter which javac gets used - 32-bit or 64-bit.

>javac MyProgramWith32BitNativeLib.java

For the actual execution of the program, it is important to specify the path to the 32-bit version of java.exe

I'll post a code example for Windows, since that seems to be the OS used by the OP.

Windows

Most likely, the code will be something like:

>"C:\Program Files (x86)\Java\jre#.#.#_###\bin\java.exe" MyProgramWith32BitNativeLib 

The difference will be in the numbers after jre. To find which numbers you should use, enter:

>dir "C:\Program Files (x86)\Java\"

On my machine, the process is as follows

C:\Users\me\MyProject>dir "C:\Program Files (x86)\Java"
 Volume in drive C is Windows
 Volume Serial Number is 0000-9999

 Directory of C:\Program Files (x86)\Java

11/03/2016  09:07 PM              .
11/03/2016  09:07 PM              ..
11/03/2016  09:07 PM              jre1.8.0_111
               0 File(s)              0 bytes
               3 Dir(s)  107,641,901,056 bytes free

C:\Users\me\MyProject>

So I know that my numbers are 1.8.0_111, and my command is

C:\Users\me\MyProject>"C:\Program Files (x86)\Java\jre1.8.0_111\bin\java.exe" MyProgramWith32BitNativeLib