using Contact.NICKNAME

I am trying to read out the Nickname of a Conta开发者_如何学运维ct in a BlackBerry Java app but the method call

getPIMList().isSupportedField(BlackBerryContact.NICKNAME)

always tells me that the Field is not supported.

Am I doing something wrong or is it really not supported? Because the devices I am testing on allow me to add a Nickname field in the address book.