René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Vector unconnected interface handling","articleBody":"https://github.com/hardbyte/python-can/blob/6d0f4a66d121e86d2c8c707ce11546822a0ca1d2/can/interfaces/vector/canlib.py#L102-L104\r\n\r\nIf the application config is okay but the interface that channel is associated to is disconnected, xlGetChannelIndex returns a negative number and `mask = 1 \u003c\u003c idx` fails with `ValueError: negative shift count`.\r\n\r\nIn 2.1.0, it died here: https://github.com/hardbyte/python-can/blob/338d21191ef89e9cb515eae80d9d945d12028477/can/interfaces/vector/canlib.py#L83-L85\r\nwith `can.interfaces.vector.exceptions.VectorError: XL_ERR_WRONG_PARAMETER`, presumably as a result of passing the negative self.mask to the Vector API.\r\n\r\nNeither is a particularly graceful way of handling the error. Does their API documentation say what's supposed to happen when the interface isn't there? Is it possible to test that and raise a nicer exception?","author":{"url":"https://github.com/tpwrules","@type":"Person","name":"tpwrules"},"datePublished":"2018-07-09T09:28:26.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":5},"url":"https://github.com/353/python-can/issues/353"}