FFT MegaCore Function simulation in Modelsim never finished

Hi again,

For me, I always used only the .vho file (VHDL equivalent of .vo) for the simulation and it worked.

And this is what is indicated p 15 of the FFT user guide :

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To simulate your design, use the IP functional simulation models generated by IP Toolbench. The IP functional simulation model is the .vo or .vho file generated as specified in “Set Up Simulation” on page 2–10. Compile the .vo or .vho file in your simulation environment to perform functional simulation of your custom variation of the MegaCore function.

For more information about IP functional simulation models, refer to the Simulating Altera Designs chapter in volume 3 of the Quartus II Handbook.

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And in the corresponding chapter of the Quartus II Handbook, it is indicated :

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When you simulate your design, only compile the .vo or .vho for these IP cores in your simulator, rather than the corresponding HDL file, which may be encrypted to support only synthesis by the Quartus II software.

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So, I find strange that you need the fft.v file.

Moreover, looking at Table 2-1 p 2-11 and 2-12 of the FFT user guide, which indicates the files generated by the MegaWizard, there is no <variation name>_bb.v file. So I don't understand where you get this fft_bb.v file.