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My projects in Eclipse Kepler were working just fine until I downloaded TestNG. Post TestNG download, I am unable to click on the run button for my code. After I click on run or even if I hover over on run the following error message is displayed.

An internal error occurred during: "Compute launch button tooltip". java.lang.IllegalArgumentException

If I uninstall testing all my scripts run. But as soon as I reinstall Testing the issue reappears.

I have tried Re-installing Eclipse, Changing Workspace, Restarting Eclipse, Creating new projects, Installing TestNg from Eclipse Marketplace as well as by Installing new software.

Eclipse Kepler Version: Kepler Service Release 2 Build id: 20140224-0627

Java JDK 1.7

MLavoie
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Anjana Madhavan
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    Welcome to SO. See: [Issue while execution in Eclipse Kepler after TestNG installation](https://stackoverflow.com/questions/48825463/issue-while-execution-in-eclipse-kepler-after-testng-installation) – c0der Jun 05 '18 at 09:57

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