Problem 3DS max hangs , closes with or without giving any error when loading the plugin mentalray.dlz Why it Happens .. ? It happens because some firewall or spyware remover installed on your system block TCP port 7000 that is required by the mental ray to perform some system checks . Solution Disable any firewall or spyware remover permanently means it should not automatically start on system restart , you may have to change some setting in that software when you are done restart your system , then run 3DS max again ... does it work ... .. sometime it works but not all the time like in my case .

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