Invalid CVAR pointer

a wiec napisałem taki plugin
Invalid CVAR pointer

#include <amxmodx>
#include <amxmisc>
#include <fun>
 
#define PLUGIN "hs Only co 7 runde"
#define VERSION "1.01"
#define AUTHOR "rydy17"
 
new ktora
new c_hsmode
public plugin_init() {
        register_plugin(PLUGIN, VERSION, AUTHOR)
        register_event("HLTV", "new_round", "a", "1=0", "2=0")
        c_hsmode = register_cvar("amx_hs_mode","0")
        ktora = 0
}
public new_round() {
        ktora++;
        if (ktora%7==0) {
                set_pcvar_num(c_hsmode, 1)
        } else {
                set_pcvar_num(c_hsmode, 0)
        }
}

w którym po uruchomieniu wyskakują te blady a plugin nie działa
[AMXX] Displaying debug trace (plugin "10_rund.amxx")
[AMXX] Run time error 10: native error (native "set_pcvar_num")
[AMXX] [0] 10_rund.sma::new_round (line 22)


da rade mi ktoś pomoc?

#include <amxmodx>



#define PLUGIN "hs Only co 7 runde"

#define VERSION "1.01"

#define AUTHOR "rydy17"





public plugin_init() {

	register_plugin(PLUGIN, VERSION, AUTHOR)

	register_event("HLTV", "new_round", "a", "1=0", "2=0")

}

public new_round() {

	static ktora = 0;

	server_cmd("amx_hs_mode %s",++ktora%7==0 ? "1":"0")

}

wszystko działa
+ i dziękuje


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