NConvert process returns exit code -2

[Arvind]

Hi,
I am trying to run nConvert command on a input file to convert it into a JPG.
This is being done from a Java program using Runtime class.
Code snippet is as below:

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		Runtime app = Runtime.getRuntime();
		Process proc;
		try
		{
			proc = app.exec(cmd.toString(), null, workingDirectory);
		}

int exitcode = proc.waitFor();
if(exitcode = 0){
 boolean bsucess = true;
}

The variable cmd in this code has the nconvert command line statement.
This code is giving the exitcode value as -2.
What does this exit code represent?
How to fix it?
Please provide information.

Thanks
Arvind

[xnview]

exit code is -2, but the convert failed?

[Arvind]

Yes, the conversion failed.

[xnview]

Yes, the conversion failed.

-2 is a global error. What do you see when you exec it?

[Arvind]

I am trying to run nconvert on Linux programmatically.

The subprocess returned with exit code 254.

What does this mean?

The file was not generated.

[xnview]

The subprocess returned with exit code 254.

254? strange, there is no such error

[helmut]

Just had a quick look at your Java code. Shouldn't it say:

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...
if (exitcode == 0) {
 boolean bsucess = true;
}

(please note the "==" for comparison instead of "=" for assignment)? Is your code snippet above complete? I assume that the Runtime.exec(..) call throws an exception which means that calling nconvert failed. The exception is simply ignored because there's no "catch", so you will never know and your exit code is undefined. I *strongly* recommend to add a "catch" block.

[icabod]

The subprocess returned with exit code 254.

254? strange, there is no such error

I would guess that as NConvert is being run programatically in this instance, then the return code is being put into an unsigned char? 254 == -2 in that case.

Just my input, and probably not helpful

'bod

[xnview]

is being put into an unsigned char? 254 == -2 in that case.

Yes and NConvert return -2 if there is an error in the process. So you can perhaps check the output?

[Arvind]

Hi,
I put try-catch block surrounding Runtime.exec() code. It shows the correct error.

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got the exception-->java.io.IOException: Cannot run program ""//data/stacks/nConvert/NConvert/nconvert"" : java.io.IOException: error=2, No such file or directory

The code was trying to run this command:

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Executing the command -->"//data/stacks/nConvert/NConvert/nconvert" -out png -truecolors  -o  "/data/Apparel/apache-tomcat-6.0.18/temp/fcs4973485609669380733/fe8216cf-59e2-4ea2-9f52-fa33c44fc285/generic/Pant_viewable.png" "/data/Apparel/apache-tomcat-6.0.18/temp/fcs4973485609669380733/fe8216cf-59e2-4ea2-9f52-fa33c44fc285/Pant.jpg"

This works perfectly on Windows machine; issue is only on Linux OS.
The error indicates that it could not find the path. I ran the command seperately on Linux OS. It works.

thanks
arvind

[xnview]

This works perfectly on Windows machine; issue is only on Linux OS.
The error indicates that it could not find the path. I ran the command seperately on Linux OS. It works.

So not an error of NConvert. Here i can't help you more...

[helmut]

I put try-catch block surrounding Runtime.exec() code. It shows the correct error.

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got the exception-->java.io.IOException: Cannot run program ""//data/stacks/nConvert/NConvert/nconvert"" : java.io.IOException: error=2, No such file or directory

The double slashes "//" in your file path look ambiguous to me. Also the quotation marks might cause a problem (just guessing).

This works perfectly on Windows machine; issue is only on Linux OS.
The error indicates that it could not find the path. I ran the command seperately on Linux OS. It works.

When running your command manually, did you use the quotation marks, too? This might be a permission problem, does your program have permission to execute "nconvert"?