[IBIS] I-V and V-t curve mismatch

Hello Experts,

I am finding problem with one of my IBIS model in I-V and V-t curve
mismatch. Please find the attached model for the refernence.

ERROR - Model dummy: The [Rising Waveform]
      with [R_fixture]=80 Ohms and [V_fixture]=0V
      has TYP column DC endpoints of  0.01V and  2.66v, but
      an equivalent load applied to the model's I-V tables yields
      different voltages (-0.00V and  3.90V),
      a difference of  0.25% and 31.85%, respectively.

I wrote a new tool to generate IBIS models and i am not able to make out
where it is going wrong.
I actually tried to manually calculate the currents at the points , that it
has reported in the above error.

As it is a rising waveform having a R_fixture to ground  the current at
2.66v (steady state) would be 2.66v/50 = 33.25mA.

I looked at the voltage corresponding to 33.25mA in pullup table and i found
it is coming around 0.66v. There is a mismatch in the way i am caluculating
also. But i observed a different voltage of 0.66v compared to what ibischk4
has reported i.e, 3.9v.

Let me know is the way i am cross checking is correct or not ? If not let
me  know the exact procedure.

Also let me know what might have been gone wrong in the curves. From the
shape of the curves i am not seeing any problem with the way i have
generated.

Please let me know your answers as soon as possible.

Note : Please dont consider any other values apart from the curves like Ramp
, C_comp etc as i have dummy values for these place holders.

Thanks & Regards
Sudarshan

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