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I have installed O A.D game using ubuntu universe repository. But www.play0ad.com reports there are development releases(but not stable) can install using develpment repository. So I added development repository ppa:wfg/0ad.dev Then I update the system But terminal says following error

W: Failed to fetch http://ppa.launchpad.net/wfg/0ad.dev/ubuntu/dists/precise/Release  Unable to find expected entry 'precise/source/Sources' in Release file (Wrong sources.list entry or malformed file)

Please help me to resolve this problem.Thank you!

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It will be very helpful to show the sources.list line that you added. –  Paul Oct 30 '13 at 14:05
what is sources list? –  YomalSamindu Oct 31 '13 at 15:37

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