Saturated portion of PVTO

[mbmfer]

Hi,
I'm trying to describe PVT properties of wet gas with small ogr using PVTG and PVTO keywords in black oil mode.
The run in OPM/Flow starts fine but a few steps after the pressure goes below Pdew the stepsize is chopped multiple times and the run is unable to finish.
In the commercial simulator I can only define the understaturated portion of the curve in PVTO, however from the OPM/Flow manual I understand that should be able to cover both saturated and undersaturated sections. When I try to define the saturated portion I get an error stating that Bo can only decrease with pressure (undersaturated portion). Am I missing anything obvious here?.

Thanks a lot,

Mariano Fernandez