[StrikerZ]

According to this https://sampwiki.blast.hk/wiki/PlayerTextDrawSetString the

Код:

PlayerTextDrawSetString(playerid,txt,string);

"txt" need to replaced with the textdraw and yeah i think the format line

Код:

format(txt,sizeof(txt),"InvSlot%i[playerid]",i+1);

the "txt" should be replaced with "string". Try it i'm not sure about this.