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I have made a Jar file for a test programm using Selenium's WebDriver.

I just have to run this Jar file (with selenium-server-standalone-2.39.0.jar in the same folder) on my computer and it works fine. But when I try to run it on another computer using java -jar test.jar, I have the following error message :

The error message

I did create a Main class and a correct public static void main(String[] args) method in it.

I don't remember installing anything on my computer to be able to use Selenium before. Is there something to do to run this program ?

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Make sure your java version installed on 2 pcs are the same version (very important)

In thise case , you should reinstall java on 2nd pc with the java version installed on 1st pc.

OR

Install latest version of java on 2nd pc

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The reason is, You have compiled your files in major java Version and try to run in minor java version. Make sure both machines have same version.

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Turns out I compiled the program with a 1.8 version of the JDK and I was trying to execute it on a previous version of the JRE.

I solved the problem by upgrading my JRE on the other computer.

I did try to use the -target build parameter but it seemed not to work with BlueJ IDE (I tried to add this line : bluej.compiler.options=-source 1.8 -target 1.5 to the bluej.properties file).

I'm sorry, the problem had nothing to do with Selenium whatsoever.

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