Hi ,

I downloaded this code http://wiki.forum.nokia.com/index.php/NFC_Secure_Element_Example_External_Reader

I am getting error on line:43: while (c.isCardPresent()) {

It returns this : Exception in thread "main" java.lang.NullPointerException
at Main.main(Main.java:43)

What could be problem ? How can i solve it ? My reader is acr122u.