[Konstantinos]

It compiles for me now!

pawn Код:

public OnPlayerCommandText(playerid,cmdtext[])
{
    if(!strcmp(cmdtext, "/entermech", true))
    {
        if(!IsPlayerInRangeOfPoint(playerid,5,1790.2391,-1720.8370,13.5395))
        {
            SetPlayerPos(playerid,-2029.798339,-106.675910,1035.171875);
            SetPlayerInterior(playerid,3);
            GameTextForPlayer(playerid,"Welcome to Cobomau Mechanics",4000,6);
            return 1;
        }
    }
    return 0;
}

However, about the undefined symbol "cmdtext", I don't know why.

Edit: Ironboy was faster