Source and Drain are swapped in RCX netlist!! What let them

[Reotaro Hashemoto]

Hi,

I'm working on the phisical verification using Assura flow, there's
two files: RSF_pre and T35FL.pre ..
When running:

assura RSF_pre
and checking the output netlist, I noticed that all MOSFET transistors

have thier Source and drain swapped!!! What is the possible reason
that can cause such swapping???

Could any one help me please?
Thanks in advance,
Ahmad