Handle mytimer; public void OnPluginStart() { PrintToChatAll("Plugin loaded and timer creted"); mytimer = CreateTimer(60.0, timer_callback); RegConsoleCmd("sm_test", test); } public Action test(int client, int args) { if(mytimer != null) { delete mytimer; PrintToChat(client, "You stop timer."); } PrintToChat(client, "Piip!"); return Plugin_Handled; } public Action timer_callback(Handle timer) { // For example, when multiple timers have accidentally created to same handle, ignore previous timers. // Or if Handle is null. if(timer != mytimer) { return Plugin_Continue; } // When you know timer callback will finish, not repeating. // First step is clear handle. mytimer = null; PrintToChatAll("My timer got executed"); return Plugin_Continue; }