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I press print button and then...

+Pie Number of slices to send: Send
I try to launch crytal report viewer ,it's display correctly but when I press print button.It display error on my error page :java.lang.NullPointerException

then I try again by change a little bit code and It works !

Different between first and second is
first receive value of parameter field ( of cyrstal report ) from previous.
For second I fix values for parameter field.

Who can help me,now I so wonder ?
Thanks for coming help.
Good heavens! What have you done! Here, try to fix it with this tiny ad:
a bit of art, as a gift, the permaculture playing cards
https://gardener-gift.com


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