Hello,
I've seen a couple of topics regarding this issue before but haven't seen many been resolved. I've been trying to work with Xillybus to implement some simple algorithms on the Zedboard. I successfully got the simple trig function to work (the one hosted on the Xillybus tutorial) and ran into the Opt 31-67 problem, but somehow managed to clear it and get a successful bitstream generation. I've now moved to my own project of a simple matrix multiplier. HLS runs fine, but Vivado is again having issues with generating a bitstream and fails in implementation. I've gotten bitstream generation to succeed with 2013 and 2014 versions of Vivado fairly consistently, but 2015 seems to have some issues. I removed the debug lines in the xillydemo.v as the Xillybus tutorial said, but am now getting these errors:
Thanks for your help!