René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"UnboundLocalError: local variable 's' referenced before assignment","articleBody":"When mouse clicking in root locus plot outside in the border region of the window I get this:\r\n```\r\nTraceback (most recent call last):\r\n  File \"C:\\Users\\me\\PycharmProjects\\f\\venv\\lib\\site-packages\\matplotlib\\cbook.py\", line 298, in process\r\n    func(*args, **kwargs)\r\n  File \"C:\\Users\\me\\PycharmProjects\\f\\venv\\lib\\site-packages\\control\\pzmap.py\", line 470, in _click_dispatcher\r\n    K, s = _find_root_locus_gain(event, sys, ax)\r\n  File \"C:\\Users\\me\\PycharmProjects\\f\\venv\\lib\\site-packages\\control\\pzmap.py\", line 531, in _find_root_locus_gain\r\n    return None, s\r\nUnboundLocalError: local variable 's' referenced before assignment\r\n```","author":{"url":"https://github.com/NikolaiVChr","@type":"Person","name":"NikolaiVChr"},"datePublished":"2024-06-29T09:23:16.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":2},"url":"https://github.com/1016/python-control/issues/1016"}