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Title: Multicraft Tekkit install: Invalid jar Version: 3.1.2 OS: Win 7 Java Version: 7 Description of Problem: I have installed Tekkit.jar in the list but when I start the server it says it is an invalid jar. I have tried renaming it... (Installing to the Daemon jar directory) Error Messages: [server] INFO Error: Invalid or corrupt jarfile Error Log: 08.01 20:55:45 [Multicraft] Server stopped 08.01 20:55:45 [Multicraft] Looks like a crash, check the server console. Return value: 1 08.01 20:55:45 [Multicraft] Server shut down 08.01 20:55:44 [server] INFO Error: Invalid or corrupt jarfile C:\Users\Hayden\Desktop\Desktop\Multicraft\multicraft\jar\craftbukkit.jar 08.01 20:55:44 [Multicraft] Loaded config for "Tekkit-3.1.2" 08.01 20:55:44 [Multicraft] Starting server! 08.01 20:55:44 [Multicraft] Loading server properties 08.01 20:55:44 [Multicraft] Server stopped 08.01 20:55:44 [Multicraft] Retrying server startup