device_fridge_2d bug

[HuangJunye]

---

AttributeError Traceback (most recent call last)
in ()
7 delay=0, sample=1,
8 timeout=10, wait=5.0,
----> 9 comment=comment_string
10 )

~\Documents\Github\GrapheneLab-Measurement-Code\measurement\device_fridge_2d.py in device_fridge_2d(graph_proc, rpg, data_file, read_inst, sweep_inst, set_inst, set_value, pre_value, finish_value, fridge_sweep, fridge_set, device_start, device_stop, device_step, device_finish, device_mid, fridge_start, fridge_stop, fridge_rate, delay, sample, timeout, wait, comment, network_dir, persist, x_custom)
96
97 for j in range(num_of_inst):
---> 98 image_view[j].setImage(z_array[j], scale=(x_scale, y_scale), pos=(x_vec[0], y_start))
99
100 for i, v in enumerate(x_vec):

AttributeError: 'NoneType' object has no attribute 'setImage'