Can I use initial q1 in the QG model?

[char998]

I am trying to initialize q1 by using the command as described in the documentation: m.set_q1q2(q1,q2, check=True) but it does not work. I actually get this error:

AttributeError: 'QGModel' object has no attribute 'q1'. What could be the problem?

Thank you for your time