Dear support,
I am trying to create an expression report definition which uses inputs from 2 other reports. When using the GUI this works just fine:

However, I cannot get its reference using session.settings.solution.report_definitions.expression.get(name='delta') and it looks like it doesn't exist. I get a None type object

And I use pyfluent to create an zero expression using for instance:
session.settings.solution.report_definitions.expression.create(name='delta-2')
or using
session.settings.solution.report_definitions.expression['test-2'] = {'average_over': 1, 'create_report_file': False, 'create_report_plot': False, 'define': ' ', 'expr_value': 0.0, 'list_valid_report_names': '', 'name': 'test-2', 'output_parameter': False}
It creates the expression but it is set as invalid and I cannot access to it to modify it to understand it's structure as I usually do:

Could I get some guidance on how to set this expression : {max-temp-outlet}-{ave-temp-outlet} which uses the outputs from the reports 'max-temp-outlet' and 'ave-temp-outlet'?