Error: Connected system ID hash not found on target at expected base address

Since you failed to get the systemID and timestamp, a quite simple thing to complete, there is something wrong with the cpu and memory system. I just figure out the same problem as you have. Here is my experience for reference.

I checked my design carefully and found nothing doubtful, so I wondered why the cpu didn't respond to the PC. Oh, I forgot the reset signal and it was asserted forever by a switch. I flipped the switch and every thing worked.

So, figure out why your cpu doesn't respond the systemID inquiry, then you can advance to the next step.