Ошибка компиляции Smoke HealthNade

Ошибка компиляции:
Welcome to the AMX Mod X 1.8.1 Compiler.
Copyright © 1997-2006 ITB CompuPhase, AMX Mod X Team

Smoke_HealthNade.sma(153) : error 017: undefined symbol "MaxClients"

1 Error.
Could not locate output file Smoke_HealthNade.amx (compile failed).

/**
* Credits: Arkshine, https://forums.alliedmods.net/showpost.php?...mp;postcount=16
*
*/

#include <amxmodx>
#include <fakemeta>
#include <engine>
#include <fun>
#include <csx>

/* Settings */
/* Enable action only for the privileged */
#define ACCESS_FLAGS ( ADMIN_LEVEL_H )

/* Enable action only for teammates */
// #define ONLY_FOR_TEAMMATES

const HEALTH_TO_HEAL = 50;
const HEALTH_MAX = 100;
const HEAL_RADIUS = 300;

new const MODEL_V[] = "models/v_he_mk_nade.mdl";
new const MODEL_P[] = "models/p_he_mk_nade.mdl";
new const MODEL_W[] = "models/w_he_mk_nade.mdl";

new const SPRITE_EXPLODE1[] = "sprites/heal_explode.spr";
new const SPRITE_PROS[] = "sprites/heal_shape.spr";

new const SOUND_HEAL[] = "woomen_expr.wav";
/* End of settings */

enum {
XO_WEAPON = 4,
XO_CGRENADE = 5,
m_pPlayer = 41,
m_usEvent = 114
}

new const EXCLASS[] = "grenade";

enum { STATUSICON_HIDE = 0, STATUSICON_FLASH = 2 };

const flagSmokeEvent = (1 << 1);

#define IsSgGrenade(%1) (get_pdata_int(%1, m_usEvent, XO_CGRENADE) & flagSmokeEvent)

#define _GetEntOwner(%1) pev(%1, pev_owner)
#define _GetEntOrigin(%1,%2) pev(%1, pev_origin, %2)

#define _SetViewModel(%1,%2) set_pev(%1, pev_viewmodel2, %2)
#define _SetWorldModel(%1,%2) set_pev(%1, pev_weaponmodel2, %2)

new g_MsgId_StatusIcon, g_MsgId_ScreenFade;

new g_pFirstExplosion,
g_pPros,
g_pCircle;

new const VERSION[] = "0.0.3";

public plugin_init() {
register_plugin("Smoke: HealthNade", VERSION, "wopox1337");

g_MsgId_StatusIcon = get_user_msgid("StatusIcon");
g_MsgId_ScreenFade = get_user_msgid("ScreenFade");

register_touch(EXCLASS, "*", "CGrenade_ExplodeTouch");

register_event("CurWeapon", "Event_CurWeapon", "be", "1=1");
}

public plugin_precache() {
precache_model(MODEL_V);
precache_model(MODEL_P);
precache_model(MODEL_W);

g_pFirstExplosion = precache_model(SPRITE_EXPLODE1);
g_pPros = precache_model(SPRITE_PROS);
g_pCircle = precache_model("sprites/shockwave.spr");

precache_sound(SOUND_HEAL);
}

public Event_CurWeapon(pPlayer) {
enum { WeaponID = 2 };
if(read_data(WeaponID) == CSW_SMOKEGRENADE) {

#if defined ACCESS_FLAGS
if(!IsUserHaveAccessToUse(pPlayer)) return;
#endif

OnPlayer_SetViewModels(pPlayer);
Send_StatusIcon__Cross(pPlayer);
}
else Send_StatusIcon__Cross(pPlayer, .status = STATUSICON_HIDE);
}

public grenade_throw(pPlayer, pEnt, w_id) {
if(w_id != CSW_SMOKEGRENADE)
return;

#if defined ACCESS_FLAGS
if(!IsUserHaveAccessToUse(pPlayer)) return;
#endif

OnGrenade_SetWorldModel(pEnt);
}

public CGrenade_ExplodeTouch(const pEnt, const pOther) {
// Filter to another grenades type
if(!IsSgGrenade(pEnt))
return;

static iOwner; iOwner = _GetEntOwner(pEnt);

#if defined ACCESS_FLAGS
if(!IsUserHaveAccessToUse(iOwner)) return;
#endif

static Float: fOrigin[3], iOrigin[3];
_GetEntOrigin(pEnt, fOrigin);
FVecIVec(fOrigin, iOrigin);

// Show visuals
Send_Explode(iOrigin);
Send_Pros(iOrigin);
Send_ShockWave(iOrigin);
OnGrenade_PlaySound(pEnt);

// Removed default smoke entity, and his detonate event accordingly
OnGrenade_RemoveByTouch(pEnt);

// Action on near players
HealPlayersOnRadius(iOwner, fOrigin);
}

stock HealPlayersOnRadius(pInflictor, Float: fOrigin[3]) {
for(new pPlayer = 1; pPlayer <= MaxClients; pPlayer++) {
if(is_user_alive(pPlayer)) {

#if !defined ONLY_FOR_TEAMMATES
if(get_user_team(pInflictor) != get_user_team(pPlayer))
continue;
#endif
#pragma unused pInflictor

static Float: playerOrigin[3];
_GetEntOrigin(pPlayer, playerOrigin);

if(get_distance_f(fOrigin, playerOrigin) < HEAL_RADIUS)
OnPlayer_HealEvent(pPlayer);
}
}
}

stock OnPlayer_HealEvent(const pPlayer) {
set_user_health(pPlayer, min(get_user_health(pPlayer) + HEALTH_TO_HEAL, HEALTH_MAX));
__UTIL_ScreenFade(pPlayer);
}

stock OnPlayer_SetViewModels(const pPlayer) {
_SetViewModel(pPlayer, MODEL_V);
_SetWorldModel(pPlayer, MODEL_P);
}

stock OnGrenade_SetWorldModel(const pEnt)
engfunc(EngFunc_SetModel, pEnt, MODEL_W);

stock OnGrenade_RemoveByTouch(const pEnt)
engfunc(EngFunc_RemoveEntity, pEnt);

stock Send_StatusIcon__Cross(const pPlayer, status = STATUSICON_FLASH) {
message_begin(MSG_ONE_UNRELIABLE, g_MsgId_StatusIcon, .player = pPlayer);
write_byte(status);
write_string("cross");
write_byte(0);
write_byte(255);
write_byte(0);
message_end();
}

stock OnGrenade_PlaySound(const pEnt)
engfunc(EngFunc_EmitSound, pEnt, CHAN_WEAPON, SOUND_HEAL, VOL_NORM, ATTN_NORM, 0, PITCH_NORM);


stock Send_Explode(iOrigin[3]) {
emessage_begin(MSG_PVS, SVC_TEMPENTITY);
ewrite_byte(TE_EXPLOSION);
ewrite_coord(iOrigin[0]);
ewrite_coord(iOrigin[1]);
ewrite_coord(iOrigin[2] + 65);
ewrite_short(g_pFirstExplosion);
ewrite_byte(30);
ewrite_byte(20);
ewrite_byte(TE_EXPLFLAG_NOSOUND | TE_EXPLFLAG_NOPARTICLES);
emessage_end();
}

stock Send_Pros(iOrigin[3]) {
emessage_begin(MSG_PVS, SVC_TEMPENTITY);
ewrite_byte(TE_SPRITETRAIL);
ewrite_coord(iOrigin[0]);
ewrite_coord(iOrigin[1]);
ewrite_coord(iOrigin[2] + 20);
ewrite_coord(iOrigin[0]);
ewrite_coord(iOrigin[1]);
ewrite_coord(iOrigin[2] + 80);
ewrite_short(g_pPros);
ewrite_byte(20);
ewrite_byte(20);
ewrite_byte(4);
ewrite_byte(20);
ewrite_byte(10);
emessage_end();
}

stock Send_ShockWave(iOrigin[3]) {
emessage_begin(MSG_PVS, SVC_TEMPENTITY);
ewrite_byte(TE_BEAMCYLINDER);
ewrite_coord(iOrigin[0]);
ewrite_coord(iOrigin[1]);
ewrite_coord(iOrigin[2]);
ewrite_coord(iOrigin[0]);
ewrite_coord(iOrigin[1]);
ewrite_coord(iOrigin[2] + HEAL_RADIUS);
ewrite_short(g_pCircle);
ewrite_byte(0);
ewrite_byte(1);
ewrite_byte(5);
ewrite_byte(30);
ewrite_byte(1);
ewrite_byte(10);
ewrite_byte(255);
ewrite_byte(40);
ewrite_byte(255);
ewrite_byte(5);
emessage_end();
}

stock __UTIL_ScreenFade(const pPlayer, iColor[3] = {170, 255, 0}, iAlpha = 80, Float: flFxTime = 1.0, Float: flHoldTime = 0.3) {
const FFADE_IN = 0x0000;

emessage_begin(MSG_ONE_UNRELIABLE, g_MsgId_ScreenFade, .player = pPlayer);
ewrite_short(FixedUnsigned16(flFxTime));
ewrite_short(FixedUnsigned16(flHoldTime));
ewrite_short(FFADE_IN);
ewrite_byte(iColor[0]);
ewrite_byte(iColor[1]);
ewrite_byte(iColor[2]);
ewrite_byte(iAlpha);
emessage_end();
}

stock FixedUnsigned16(Float:flValue, iScale = (1 << 12)) {
return clamp(floatround(flValue * iScale), 0, 0xFFFF);
}

stock IsUserHaveAccessToUse(const pPlayer) {
// Anytime we can add other checks, like cached bool
return (get_user_flags(pPlayer) & ACCESS_FLAGS);
}

stock IsAllowedToUse() {
return true;
}