Problems running an exe from Java App

[nationavon]

Here's a weird one. I am running a program called Pad.exe from my Application. Pad.exe is a simple DOS app that pads each line in a file with a specified length. the following is the line from my Java App:

Process p = Runtime.getRuntime().exec(p_program + " 749 " + i_directory + "\\" + txtfile + " " + o_directory + "\\" + txtfile);

p_program is Pad.exe
749 is the pad length
i_directory is the input directory
o_directory is the output directory
txtfile is the file to be padded

Here is where it gets weird. If I run my Java Application I get a windows pop-up box with the following error:

C:\WINDOWS\system32\ntvdm.exe.
Error while setting up enviroment for the application. Choose 'Close' to terminate application.

After I close the error window I can go to the command line and run the Pad.exe program at the DOS prompt. After I run Pad.exe at the DOS prompt I can run my Java Application from the the same command line and it runs successfully. It is almost like when I manually run Pad.exe from the comand line it is setting up the enviroment. I don't see any changes to the enviroment variables. Can anyone think of something I can do in my Java App to get the environment setup.

Nathan

 

[palbano]

Try something more like this and see if it works. Also build the string as a variable so you can output it using System.out.println( str) to see exactly what your string concatenation code is building.

cmd /c start pad.exe <the params for pad>

-pete

 

[hologram]

Try to put your command and parameters in a String array, like the following example.
The following code will launch notepad on a Windows system.

public class WinCmdExample {

public WinCmdExample() {
}

private void doIt() {
Runtime run = Runtime.getRuntime();
//String[] args = { "COMMAND.COM", "/C", "notepad" };
String[] args = { "notepad", "D:\\Test.txt" };
try {
run.exec(args);
} catch (java.io.IOException e) {
}
}

public static void main(String[] args) {
WinCmdExample example = new WinCmdExample();
example.doIt();
}
}

 

[nationavon]

Ended up using:

cmd /c start pad.exe <the params for pad>

Thanks for the help.

Nathan