Timing error when storing result in RAM blocks using In-System Memory Editor

Your post and mine were lost.

What I was implying is that your thoughts on clocking and multicycle are not right.

As to the solution, I think you need first to word(identify) the problem. It could be your output will not cycle exactly or your computation logic is buggy. I will put timing as last culprit if at all, check rtl simulation to exclude timing.