[DreamWorks]

Hello, please everytime i want to compile this plugin, i have this error:

Copie de radar.sma(3 : error 017: undefined symbol "find_entity" Copie de radar.sma(41) : error 017: undefined symbol "find_entity" Copie de radar.sma(59) : error 017: undefined symbol "find_entity" Copie de radar.sma(62) : error 017: undefined symbol "find_entity" Copie de radar.sma(70) : error 017: undefined symbol "find_entity"

PHP Code:

#include <amxmodx>
#include <engine>


public plugin_init()
{
    register_plugin("Terrorists on Radar", "0.1", "KRoTaL")
    register_event("DeathMsg","death_event","a")
    register_event("TextMsg", "game_restart", "a", "1=4", "2&#Game_C", "2&#Game_w")
    register_event("SendAudio", "round_end", "a", "2=%!MRAD_terwin", "2=%!MRAD_ctwin", "2=%!MRAD_rounddraw")
}

public plugin_precache()
{
    precache_model("models/scientist.mdl")
    precache_model("models/hostage.mdl")
    precache_sound("hostage/hos1.wav")
    precache_sound("hostage/hos2.wav")
    precache_sound("hostage/hos3.wav")
    precache_sound("hostage/hos4.wav")
    precache_sound("hostage/hos5.wav")
    precache_sound("hostage/hos6.wav")
    precache_sound("hostage/hos7.wav")
}

public round_end()
{
    set_task(4.0, "endround", 2635784212)
}

public game_restart()
{
    set_task(0.5, "endround", 7642154241)
}

public endround()
{
    new ent = find_entity(-1, "hostage_entity")
    while(ent > 0)
    {
        new tempent = find_entity(ent, "hostage_entity")
        if(entity_get_edict(ent, EV_ENT_aiment) > 0)
        {
            remove_entity(ent)
        }
        ent = tempent
    }
    new players[32], inum
    get_players(players, inum, "a", "TERRORIST")
    for(new i = 0 ; i < inum ; i++)
    {
        createhos(players[i])
    }
}

public death_event()
{
    new id = read_data(2)
    if(get_user_team(id) == 1)
    {
        new hostage_id = find_entity(-1, "hostage_entity")
        while(hostage_id > 0)
        {
            if(entity_get_edict(hostage_id, EV_ENT_aiment) == id)
            {
                remove_entity(hostage_id)
                return PLUGIN_CONTINUE
            }
            hostage_id = find_entity(hostage_id, "hostage_entity")
        }        
    }

    return PLUGIN_CONTINUE
}

public createhos(id)
{
    new hostage = create_entity("hostage_entity")
    if (hostage > 0)
    {
        DispatchKeyValue(hostage, "classname", "hostage_entity")
        DispatchKeyValue(hostage, "origin", "8192 8192 8192")
        //entity_set_int(hostage, EV_INT_effects, 128)
        DispatchSpawn(hostage)
        entity_set_int(hostage, EV_INT_solid, 0)
        entity_set_int(hostage, EV_INT_movetype, MOVETYPE_FOLLOW)
        entity_set_edict(hostage, EV_ENT_aiment, id)
        return hostage
    }
    return 0
} 


[CreePs]

find_entity

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find_ent_by_class