Running error when setting want_AB = False

[SFeng978]

I just got an error when running the prepare_sim.py with setting want_AB=False.
Here is the error:

It seems a problem with the variable 'deltac_rank' in this case.

[Lehman Garrison]

@SandyYuan, can you take a look?

[Sihan (Sandy) Yuan]

This issue has been fixed in the newest version.