Tolerance relaxation when calculating DC operating point - impact on accuracy of SP analysis

Hello,

I have a general question on SPECTRE-17191 warning:

Warning from spectre during DC analysis `dcOp'.
WARNING (SPECTRE-17191):
Tolerance relaxation is used to obtain final DC solution which may affect the accuracy of the result. This is mainly caused by the high impedance nodes in the circuit. Use the dyn_highz check to determine the high impedance nodes. Setting/assigning appropriate initial values to these nodes will usually help to improve both performance and accuracy of DC simulations.

I would like to obtain high accuracy results from SP analysis (~70dB level) for an RC extracted block. I am using SpectreX CX accuracy with advanced options enabled: Preset Override = reltol(1e-4), Parasitic Optimization = OFF.

My concern is that when relaxation is used to obtain the DC operating point for the S-parameter analysis, the accuracy of the final results is impacted. 

Is there a quantitive way to approximate how much influence relaxation has on the results?

Spectre version: 24.10

Thank you,

Macio