I'm using PyFMI.master to do co-simulation and the FMUs are compiled by JModelica.

However, PyFMI.master said that "UserWarning: The model, room_interface_3, does not support directional derivatives which is necessary in-case of an algebraic loop. The simulation might become unstable..."

It is indeed unstable because my co-simulation crashed with an absurd situation(like temperature blew the min limit).

So, are there any solutions to this problem? Thanks in advance!