error lua dump

i play sandbox for a while evreything is fine then it freezes shutsdown and says error lua file dump or just cloes and a xfire exception comes up what the hell is wrong? o it only happens on sandbox not rp or paintball just the build servers like spacebuild and sandbox anything having to do with building things. i tried evreything i delete all steam folders re installed all my games and still keeps happening i even started all my folders new so there is no moded material in any folders. someone help me.

I had the same thing happen. With me Garrys Mod just closed with no explanation, then the message came up saying lua error dump.

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