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i want to add https://sampwiki.blast.hk/wiki/Useful_Functions
to my scripts.

But after i wrote "#include <uf>" , it causes some errors:

D:\GTA San Andreas\GTA San Andreas\pawno\include\uf.inc(43) : warning 201: redefinition of constant/macro (symbol "MAX_PICKUPS")
D:\GTA San Andreas\GTA San Andreas\pawno\include\uf.inc(297 : error 025: function heading differs from prototype
D:\GTA San Andreas\GTA San Andreas\pawno\include\uf.inc(2979) : error 021: symbol already defined: "strrest"
D:\GTA San Andreas\GTA San Andreas\gamemodes\44444.pwn(254) : error 021: symbol already defined: "OnVehicleSpawn"

how to solve it?thanks.