[corrected]Error integrating a Nios II in Quartus II

Hi,

I want to use a Nios II cpu in a Quartus II design. I've followed the "Nios II hardware development" tutorial of Altera and when trying the "Analysis and Elaboration" step, I get the following error: Error (12006): Node instance "inst4" instantiates undefined entity "my_niosii"What does it mean exactly and how can I correct that?

Thanks.

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solved: I forgot the .qip file.