The python interface for running a SYZ sweep in SIwave is unclear to me. The documentation for the method EdbSiwave.add_siwave_syz_analysis suggests you are adding an AC analysis to the EDB, however, ...
After successfully running a DCIR simulation in AEDT using PyAEDT and PyEDB, the export of DCIR results with self.edb.export_siwave_dc_results(self.cleaned_edb_path ...