[Schneider]

Here, this code works:
You might want to add an extra check to see if the player is not in the quary (since that location is below waterlevel.

pawn Код:

#include <a_samp>
new WalkWaterObject[MAX_PLAYERS];
new bool:WalkingOnWater[MAX_PLAYERS];

public OnPlayerCommandText(playerid, cmdtext[])
{
        if (!strcmp(cmdtext, "/walkwater", true))
        {
                if(WalkingOnWater[playerid] == false)
                {
                    WalkWaterObject[playerid] = CreatePlayerObject(playerid, 8661, 0.000000, 0.000000, 0.000000, 178.400314,0.000000,0.000000);
                    WalkingOnWater[playerid] = true;
                    SendClientMessage(playerid, 0x00FF00AA, "Walking on water enabled");
                    return 1;
                }
                else
                {
                    DestroyPlayerObject(playerid, WalkWaterObject[playerid]);
                    WalkingOnWater[playerid] = false;
                    SendClientMessage(playerid, 0xFF0000AA, "Walking on water disabled");
                }
                return 1;
        }
        return 0;
}

public OnPlayerDisconnect(playerid, reason)
{
    if(WalkingOnWater[playerid] == true)
    {
        DestroyPlayerObject(playerid, WalkWaterObject[playerid]);
        WalkingOnWater[playerid] = false;

    }
    return 1;
}

public OnPlayerUpdate(playerid)
{
    if(WalkingOnWater[playerid] == true)
    {
        new Float:pos[3];
        GetPlayerPos(playerid, pos[0], pos[1], pos[2]);
        if(pos[2] < 2)
        {   
            SetPlayerObjectPos(playerid, WalkWaterObject[playerid], pos[0], pos[1], 0.2);
        }
    }
    return 1;
}