Simscape powergui discrete solver tolerance

In the Documentation of the powergui is not specified if the solver tolerance is absolute or relative. I guess its relative but does anyone know for sure?

https://de.mathworks.com/help/releases/R2020b/physmod/sps/powersys/ref/powergui.html

"Largest acceptable solver error.

Dependencies

To enable this parameter, set Simulation type to Discrete and expand Solver details for nonlinear elements."