What type of Barcode are you trying to print?
In the Report Designer a report field displays the expression assigned to it in the font selected. It may be blank if font does not have the characters to display it.
What printer are you using? Did you try to print to another printer?

>I try to print invoice with barcode font.
>I tried fonts of two company , Both same problem:
>
>On design time the field control appeared blank.
>On run time (preview mode) I see the barcode on the invoice but when I print it it's again blank.