Start 32bit process on 64bit OS

Question

My C# programm starts java application on 64bit OS (Windows). Java process is 64bit, how can i fix my launching code to start java process in 32bit?

My launching code:

ProcessStartInfo info = new ProcessStartInfo();
info.WorkingDirectory = ServerProperties.ServerWorkingDirectory;
info.FileName = "java"
info.Arguments = "some arguements"
ServerProcess = new Process();
ServerProcess.StartInfo = info;
ServerProcess.Start();

Thanks!

"Java process is 64bit" -- it would seem the JVM installed (or at least the one launched) is 64bit? — , Jul 04 '12 at 22:23
[There should be no problem](http://stackoverflow.com/questions/783662/java-32-bit-vs-64-bit-compatibility) running your code on 64 bit, or do errors occur when you do? — CodeCaster, Jul 04 '12 at 22:25
c:\windows\syswow64\java.exe. Why oh why? Rhetorical question. — Hans Passant, Jul 04 '12 at 22:28

score 5 · Accepted Answer · answered Jul 04 '12 at 22:22

This is more a function of the process you're starting as opposed to the process that's starting it (i.e. the process that you're starting has to have been compiled/targeted to x86 as opposed to x86-64).

However, if both x86 and x86-64 java.exe are installed on the machine-in-question, you can probably hunt the x86 one down by looking in Program Files (x86) as opposed to Program Files.

score 0 · Answer 2 · answered Jul 04 '12 at 22:33

If you host your application in IIS you need enable x86 processes for pool of web app. Follows next steps:

Select the app pool for your web app.
Click Advanced Settings under Edit Application Pool on the right.
Change the value of Enable 32-Bit Applications to True.

Check next article for details - Support of 32-bit applications in the 64-bit Windows environment

Start 32bit process on 64bit OS

2 Answers2