Quartus Illegal configuration of I/O primitive inst: port ERROR

Hi,

I assume this is just part of your design, and that master, nc[5], and ncin[5] are connected somewhere.

I tried to duplicate your schematic in quartus 13.0, and I get this error:

Error (17037): Illegal configuration of I/O primitive inst: port "io" should be directly connected to a single bidir pin.

But, I also get this warning:

Warning (275080): Converted elements in bus name "nc" using legacy naming rules. Make any assignments on the new names, not on the original names.

Warning (275081): Converted element name(s) from "nc[5]" to "nc5"

I think Quartus renames any bus net name such as bus[x] to busx. So you end up with both the input and i/o pin on ALT_IOBUF connected to net nc5.

I tried renaming the net nc[5] to ncout[5], and then the error went away for me.