IO timing margin problem

[sicajc]

Hello, I am trying to use cacti to model the 3D-DRAM model, but stumble upon a problem, I run the default 3DDRAM_Samsung3D9Gb_extenened.cfg but get this weird IO Timing Margin and Voltage Margin. Is this a bug? Or has anyone encountered or solve this problem? Thanks.

[rensushan]

I also get stuck on this problem.
The read/write energy is too high ( 1.xxxe+54 nJ).
It seems overflow happens?