**Is your feature request related to a problem? Please describe.** As of now, doing ```python from pyscipopt import Model scip = Model() scip.setParam("exact/enabled", True) ``` throws the error ``` [set.c:766] ERROR: Exact solving mode can only be enabled/disabled before reading/creating a problem. ``` **Describe the solution you'd like** I would like to be able to use exact fractional SCIP **Additional context** None