There is a problem in Eclipse when I run my Android application:
An internal error occurred during: \"Launching New_configuration (1)\".
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You must specify project name in settings (see the image) and change android SDK suitable with your version.
Go to Run>Run Configuration
It will bring up the following screen. You can enter the project name manually or click browse and select the project to add the name automatically.
You can solve it by the following steps:
Project -> Properties -> Run/Debug Settings:
select "Launching New_configuration"
Delete
OK
I think you might have forgotten to give name of the project.I did face the same in Eclipse Kepler .When I gave project name the issue got resolved.