Compile - Error (10481): VHDL Use Clause error at auk_ddr_controller.vhd(35):

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I am seeing the same problem. I just downloaded Quatrus II 9.0 and tried to build nios2eds\examples\verilog\niosII_cycloneII_2c35\low_cost. I got exactly the same error. I tried renaming the nios2eds\examples\verilog\niosII_cycloneII_2c35\low_cost\db directory and no change.

I am running the Quatrus Web edition 9.0 on Vista.

Any ideas?

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Yes, I figured it out. See this post.

http://www.alteraforum.com/forum/showthread.php?t=4665 (http://www.alteraforum.com/forum/showthread.php?t=4665)

The example project I was building was supposed to have been compiled by Altera under Quartus II 8.0. I'm sure it did. However, the designer probably still had 7.2 installed on his/her computer. Some of the megafunctions were from 7.2 and still referenced the old path. So they wouldn't compile on my computer. The error message was fairly cryptic.

Hmmm, maybe I also had to add a library to the project... the 7.2 megafunctions were archived in a subdirectory but I didn't notice until I'd already taken the other approach.

I can't guarantee that's your problem, too, but it's worth a shot. Try recompiling or recreating the megafunctions in your design.