Getting a False soundness result for the simplest BPMN model

[DigitalGabriele]

I am running a soundness check on a simple BPMN model, by running the following code:

import pm4py
bpmn_path = "diagram_5.bpmn"
net, initial_marking, final_marking = pm4py.read_pnml(bpmn_path)
is_sound = pm4py.check_soundness(net, initial_marking, final_marking)

The printed result for is_sound:

(False,
 {<Outputs.DIAGNOSTIC_MESSAGES: 'diagnostic_messages'>: ['There is more than one initial or final marking.']})

The BPMN looks like:

What am I doing wrong?

[fit-alessandro-berti]

Dear @DigitalGabriele

You should read the BPMN using pm4py.read_bpmn and convert it later to Petri net using pm4py.convert_to_petri_net

[DigitalGabriele]

Thanks!