Problem executing .bat file from within Java class

I'm stumped: I have no problem executing a .bat file that sets classpaths and executes a Java jar, but when I try to execute other executables first and then the .jar, my application hangs and since the DOS box doesn't come up over my GUI, I can't see what's going on.
This works:
public void execute() throws Exception {
String s = "c:\\cs47auxs\\omnijar\\omni.bat";
Process p = Runtime.getRuntime().exec("\"" + s + "\"");
p.waitFor();
JOptionPane.showMessageDialog(frame,
"The Database Has Been Successfully Reloaded.",
"Information Message",
JOptionPane.INFORMATION_MESSAGE);
Here's the .bat 'omni.bat'
set JAVA_HOME=c:\j2sdk1.4.2_04\bin
%JAVA_HOME%\java -jar C:\CS47AUXS\OMNILOADJAR\OmniLoad.jar
This doesn't work:
public void execute() throws Exception {
String s = "c:\\cs47auxs\\omnijar\\jobomni.bat";
Process p = Runtime.getRuntime().exec("\"" + s + "\"");
p.waitFor();
JOptionPane.showMessageDialog(frame,
"The Database Has Been Successfully Reloaded.",
"Information Message",
JOptionPane.INFORMATION_MESSAGE);
Here's the .bat file 'jobomni.bat'
SET NETX_HOME=C:\CS47AUXS
SET COBOL_HOME=C:\CS47AUXS\OFFLINE
CD %NETX_HOME%
CALL SET-NETX.CMD
CD %COBOL_HOME%
SSBPPC10 JOBOMNI X
SET JH=C:\J2SDK1.4.2_04\BIN
SET OMNI_HOME=C:\CS47AUXS\OMNILOADJAR
CD %OMNI_HOME%
%JH%\java -jar omniload.jar
Can anyone shed some light here? Even when I execute the application from the command line the new DOS box doesn't become visible nor can I see any errors. If I could just get that visibility, I could probably figure out what is going wrong.

Same problem with me as well.... Badly looking for a solution...
I predict the following:
- If your batch file has pretty less number of dos/shell commands then it gets executed fine with exec() and proc.waitFor();
- If you increase the number of dos/shell commands in the bat file then try executing it then it definately hangs at proc.waitFor();
Even "cmd.exe /C C:\\test.bat" hangs... if the commands are more...
Is this some sort of bug? or am i doing anything wrong? I tried searching for solution on the net and search forums... but couldnt find a solution for the same.. not sure where i missed, what i missed...
Incase some one finds a solution.. do post it here...
Message was edited by:
amadas

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