I've "successfully" installed Forge using the recommended 1.6.4 Forge installer .jar from the files page. However, when I select the Forge Profile in the profiles list and attempt to run Minecraft in Magic Launcher I get the following error: I've come across this exception every time I attempt to install Forge and run it with Magic Launcher. The solution I've found is to first run it in the default launcher minecraft.exe file. And then run it in Magic Launcher. I was curious why this would be necessary, so I am asking here. Any ideas?