[Glad2BeHere]

change these

pawn Код:

INI_ParseFile(str, "loadfaction_%s", .bExtra = true, .extra = idx );

forward loadfaction_data(idx, name[], value[]);

public loadfaction_data(idx, name[], value[])

or u can try

pawn Код:

for(new idx = 0; idx < sizeof(Factions); idx++)
    {
      if(fexist(FPATH(idx)))
      {
        INI_ParseFile(str, "loadfactiondata_%s", .bExtra = true, .extra = idx );
        printf("The membercount is %d", Factions[idx][fMaxMembers]); 
      }
    }