facebook - 400 Bad Request when implementing custom friend selector -

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i'm trying implement custom multiple friend selector invite users game. list of users calling graph api call invitablefriends, , create ui it.

after user selects corresponding users, invitation tokens of users, , make call app request follows:

public void invitefriends(string message, string title, facebookdelegate callback, string[] = null, string data = "")     {         if (fb.isloggedin)          {             fb.apprequest (message,                   to,                   "",                   null,                   null,                   data,                   title,                   callback);         }  }

but when call made, i'm getting following error:

400 bad request unityengine.debug:logerror(object) fbdebug:error(string) facebook.fallbackdata:jsfallback(string) facebook.asyncrequestdialogpost:callbackwitherrorhandling(fbresult) facebook.<start>c__iterator0:movenext()

my callback function never called, can't see error is.

i'm using unity 4.3 & facebook sdk 5.1

thanks help!

edit: i'm pretty confident issue in parameter i'm passing invite tokens invitable graph call giving me, , not ids.

i tested interactiveconsole.cs example of friendsmash invitable token , failed. how can ids of invitable friends?

just check url request. may thing wrong it. or go https://developers.facebook.com/apps/{app-id}/app-details/ in "app info" section, choose proper category , sub category.


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