Pawno compile error

D:\Utilizator Windows10\Desktop\server\gamemode\newevolution.pwn (2835) : error 017: undefined symbol "IsValidVehicle"
D:\Utilizator Windows10\Desktop\server\gamemode\newevolution.pwn (3253) : error 017: undefined symbol "pbar_back"
D:\Utilizator Windows10\Desktop\server\gamemode\newevolution.pwn (3255) : error 017: undefined symbol "pbar_fill"
D:\Utilizator Windows10\Desktop\server\gamemode\newevolution.pwn (3257) : error 017: undefined symbol "pbar_main"
D:\Utilizator Windows10\Desktop\server\gamemode\newevolution.pwn (3299) : error 017: undefined symbol "IsValidVehicle"
D:\Utilizator Windows10\Desktop\server\gamemode\newevolution.pwn (12094) : error 017: undefined symbol "GetPlayerZone1"
D:\Utilizator Windows10\Desktop\server\gamemode\newevolution.pwn (12102) : error 017: undefined symbol "GetPlayerZone1"
D:\Utilizator Windows10\Desktop\server\gamemode\newevolution.pwn (12110) : error 017: undefined symbol "GetPlayerZone1"
D:\Utilizator Windows10\Desktop\server\gamemode\newevolution.pwn (12118) : error 017: undefined symbol "GetPlayerZone1"
D:\Utilizator Windows10\Desktop\server\gamemode\newevolution.pwn (12126) : error 017: undefined symbol "GetPlayerZone1"
D:\Utilizator Windows10\Desktop\server\gamemode\newevolution.pwn (13477) : error 017: undefined symbol "IsValidVehicle"
D:\Utilizator Windows10\Desktop\server\gamemode\newevolution.pwn (15073) : error 017: undefined symbol "IsValidVehicle"
D:\Utilizator Windows10\Desktop\server\gamemode\newevolution.pwn (15089) : error 017: undefined symbol "IsValidVehicle"
D:\Utilizator Windows10\Desktop\server\gamemode\newevolution.pwn (15103) : error 017: undefined symbol "IsValidVehicle"
D:\Utilizator Windows10\Desktop\server\gamemode\newevolution.pwn (15117) : error 017: undefined symbol "IsValidVehicle"
D:\Utilizator Windows10\Desktop\server\gamemode\newevolution.pwn (15133) : error 017: undefined symbol "IsValidVehicle"
D:\Utilizator Windows10\Desktop\server\gamemode\newevolution.pwn (15139) : error 017: undefined symbol "IsValidVehicle"
D:\Utilizator Windows10\Desktop\server\gamemode\newevolution.pwn (15153) : error 017: undefined symbol "IsValidVehicle"
D:\Utilizator Windows10\Desktop\server\gamemode\newevolution.pwn (16755) : error 017: undefined symbol "IsValidVehicle"
D:\Utilizator Windows10\Desktop\server\gamemode\newevolution.pwn (16834) : error 017: undefined symbol "GetPlayerZone1"
D:\Utilizator Windows10\Desktop\server\gamemode\newevolution.pwn (31186) : error 017: undefined symbol "IsValidVehicle"
D:\Utilizator Windows10\Desktop\server\gamemode\newevolution.pwn (31198) : error 017: undefined symbol "IsValidVehicle"
D:\Utilizator Windows10\Desktop\server\gamemode\newevolution.pwn (34186) : error 017: undefined symbol "GetPlayerZone1"
D:\Utilizator Windows10\Desktop\server\gamemode\newevolution.pwn (41878) : error 017: undefined symbol "GetPlayerZone1"
D:\Utilizator Windows10\Desktop\server\gamemode\newevolution.pwn (41883) : error 017: undefined symbol "GetPlayerZone1"
D:\Utilizator Windows10\Desktop\server\gamemode\newevolution.pwn (41888) : error 017: undefined symbol "GetPlayerZone1"

Compilation aborted.Pawn compiler 3.2.3664 Copyright (c) 1997-2006, ITB CompuPhase


26 Errors.




Why that errors?