If you've installed or uploaded a new map onto your Garry's Mod server; console might be spitting out an error "Engine Hunk Overflow".
When the console does this it means that the map has more Dynamic Lights than the limit set.

To solve this problem locate the file "server.cfg" found in Configuration Files on the main screen in TCadmin after clicking on your game service.
Add in r_hunkalloclightmaps 0 somewhere in the file on a new line, save and restart your server for the problem to be solved.

r_hunkalloclightmaps 0, this command prevents the lightmaps from loading to the hunk memory.

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