{"action":"created","issue":{"url":"https://api.github.com/repos/hgrecco/pyvisa-py/issues/77","labels_url":"https://api.github.com/repos/hgrecco/pyvisa-py/issues/77/labels{/name}","comments_url":"https://api.github.com/repos/hgrecco/pyvisa-py/issues/77/comments","events_url":"https://api.github.com/repos/hgrecco/pyvisa-py/issues/77/events","html_url":"https://github.com/hgrecco/pyvisa-py/issues/77","id":125089517,"number":77,"title":"getting error: Could not instantiate backend","user":{"login":"jofus-t","id":16567808,"avatar_url":"https://avatars.githubusercontent.com/u/16567808?v=3","gravatar_id":"","url":"https://api.github.com/users/jofus-t","html_url":"https://github.com/jofus-t","followers_url":"https://api.github.com/users/jofus-t/followers","following_url":"https://api.github.com/users/jofus-t/following{/other_user}","gists_url":"https://api.github.com/users/jofus-t/gists{/gist_id}","starred_url":"https://api.github.com/users/jofus-t/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/jofus-t/subscriptions","organizations_url":"https://api.github.com/users/jofus-t/orgs","repos_url":"https://api.github.com/users/jofus-t/repos","events_url":"https://api.github.com/users/jofus-t/events{/privacy}","received_events_url":"https://api.github.com/users/jofus-t/received_events","type":"User","site_admin":false},"labels":[],"state":"closed","locked":false,"assignee":null,"milestone":null,"comments":34,"created_at":"2016-01-06T01:18:58Z","updated_at":"2016-01-15T01:07:03Z","closed_at":"2016-01-07T18:00:18Z","body":"Similar to previously reported issue(s) but slightly different and previously suggested fixes didn't seem to work.  I'm relatively new to python and even more so to pyvisa/pyvisa-py .. here's what I've looked for so far:\r\n\r\n'pip list' shows:\r\npyusb (1.0.0b2)\r\nPyVISA (1.8)\r\npyserial (3.0)\r\npyusb (1.0.0b2)\r\n\r\nOutput of 'python -m visa info':\r\nMachine Details:\r\n   Platform ID:    Windows-7-6.1.7601-SP1\r\n   Processor:      Intel64 Family 6 Model 61 Stepping 4, GenuineIntel\r\n\r\nPython:\r\n   Implementation: CPython\r\n   Executable:     C:\\Anaconda2\\python.exe\r\n   Version:        2.7.10\r\n   Compiler:       MSC v.1500 64 bit (AMD64)\r\n   Bits:           64bit\r\n   Build:          Dec  1 2015 11:29:38 (#default)\r\n   Unicode:        UCS2\r\n\r\nPyVISA Version: 1.8\r\n\r\nBackends:\r\n   ni:\r\n      Version: 1.8 (bundled with PyVISA)\r\n      #1: C:\\windows\\system32\\visa32.dll:\r\n         found by: auto\r\n         bitness: 64\r\n         Vendor: National Instruments\r\n         Impl. Version: 15728640\r\n         Spec. Version: 5243904\r\n      #2: C:\\windows\\system32\\visa32.dll:\r\n         found by: auto\r\n         bitness: 64\r\n         Vendor: National Instruments\r\n         Impl. Version: 15728640\r\n         Spec. Version: 5243904\r\n   py:\r\n      Could not instantiate backend\r\n      -> No backend available\r\n\r\nI am thinking that all the required pieces are there for the serial and USB backends, (and TCPIP as well?)  Any guidance is much appreciated."},"comment":{"url":"https://api.github.com/repos/hgrecco/pyvisa-py/issues/comments/171834132","html_url":"https://github.com/hgrecco/pyvisa-py/issues/77#issuecomment-171834132","issue_url":"https://api.github.com/repos/hgrecco/pyvisa-py/issues/77","id":171834132,"user":{"login":"hgrecco","id":278566,"avatar_url":"https://avatars.githubusercontent.com/u/278566?v=3","gravatar_id":"","url":"https://api.github.com/users/hgrecco","html_url":"https://github.com/hgrecco","followers_url":"https://api.github.com/users/hgrecco/followers","following_url":"https://api.github.com/users/hgrecco/following{/other_user}","gists_url":"https://api.github.com/users/hgrecco/gists{/gist_id}","starred_url":"https://api.github.com/users/hgrecco/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/hgrecco/subscriptions","organizations_url":"https://api.github.com/users/hgrecco/orgs","repos_url":"https://api.github.com/users/hgrecco/repos","events_url":"https://api.github.com/users/hgrecco/events{/privacy}","received_events_url":"https://api.github.com/users/hgrecco/received_events","type":"User","site_admin":false},"created_at":"2016-01-15T01:07:03Z","updated_at":"2016-01-15T01:07:03Z","body":"Thanks for the info. Can you enable logging and put the log here?"}}