IOError: open failed

[hackerDEpandas]

Hi there. I have the ledger nano s and I'm trying to verify the Secure Element by following the steps given on Ledgers web site.

I made sure to install dependencies first with
sudo apt install libudev-dev libusb-1.0-0-dev virtualenv
Then per their instruction installed ledgerblue package with
sudo pip install --no-cache-dir ledgerblue

Now when I run
python2 -m ledgerblue.checkGenuine --targetId 0x31100002

I get the following error
Traceback (most recent call last): File "/usr/lib/python2.7/runpy.py", line 174, in _run_module_as_main "__main__", fname, loader, pkg_name) File "/usr/lib/python2.7/runpy.py", line 72, in _run_code exec code in run_globals File "/usr/local/lib/python2.7/dist-packages/ledgerblue/checkGenuine.py", line 127, in <module> dongle = getDongle(args.apdu) File "/usr/local/lib/python2.7/dist-packages/ledgerblue/comm.py", line 188, in getDongle dev.open_path(hidDevicePath) File "hid.pyx", line 72, in hid.device.open_path IOError: open failed
Note I'm using Ubuntu 16.04.2 LTS. Hopefully this is just some simple fix, like maybe I'm not using the correct version of everything.

[p-t-u]

I have the exact same error, except for I am trying to run it in Python 3.

I am on Ubuntu 16.04.3 LTS, 64-bit.

Also, I cannot install the ledgerblue module under Python 2, because ECPy (which is a dependency of ledgerblue) no longer supports Python 2.

ECPy requires Python '>=3' but the running Python is 2.7.12.

[AronVanAmmers]

For me running the command with sudo is a workaround for this issue.

For ECPy / Python 2.7 there is a workaround here #29, however in my experience the results are the same.

I'm now stuck on #26 with Invalid sequence, so can't confirm that the above leads to a working end result.

[sleepdefic1t]

@hackerDEpandas

This issue is two years old, but to you or anyone else... make sure to set the udev rules.

Ledger Support: Troubleshooting - What if Ledger Wallet is not recognized on Linux?

My team also uses a script for setting udev in Ubuntu.

#!/usr/bin/env bash

cat <<EOF > /etc/udev/rules.d/20-hw1.rules
# HW.1 / Nano
SUBSYSTEMS=="usb", ATTRS{idVendor}=="2581", ATTRS{idProduct}=="1b7c|2b7c|3b7c|4b7c", TAG+="uaccess", TAG+="udev-acl"
# Blue
SUBSYSTEMS=="usb", ATTRS{idVendor}=="2c97", ATTRS{idProduct}=="0000|0000|0001|0002|0003|0004|0005|0006|0007|0008|0009|000a|000b|000c|000d|000e|000f|0010|0011|0012|0013|0014|0015|0016|0017|0018|0019|001a|001b|001c|001d|001e|001f", TAG+="uaccess", TAG+="udev-acl", MODE="0660", GROUP="plugdev"
# Nano S
SUBSYSTEMS=="usb", ATTRS{idVendor}=="2c97", ATTRS{idProduct}=="0001|1000|1001|1002|1003|1004|1005|1006|1007|1008|1009|100a|100b|100c|100d|100e|100f|1010|1011|1012|1013|1014|1015|1016|1017|1018|1019|101a|101b|101c|101d|101e|101f", TAG+="uaccess", TAG+="udev-acl", MODE="0660", GROUP="plugdev"
# Aramis
SUBSYSTEMS=="usb", ATTRS{idVendor}=="2c97", ATTRS{idProduct}=="0002|2000|2001|2002|2003|2004|2005|2006|2007|2008|2009|200a|200b|200c|200d|200e|200f|2010|2011|2012|2013|2014|2015|2016|2017|2018|2019|201a|201b|201c|201d|201e|201f", TAG+="uaccess", TAG+="udev-acl", MODE="0660", GROUP="plugdev"
# HW2
SUBSYSTEMS=="usb", ATTRS{idVendor}=="2c97", ATTRS{idProduct}=="0003|3000|3001|3002|3003|3004|3005|3006|3007|3008|3009|300a|300b|300c|300d|300e|300f|3010|3011|3012|3013|3014|3015|3016|3017|3018|3019|301a|301b|301c|301d|301e|301f", TAG+="uaccess", TAG+="udev-acl", MODE="0660", GROUP="plugdev"
# Nano X
SUBSYSTEMS=="usb", ATTRS{idVendor}=="2c97", ATTRS{idProduct}=="0004|4000|4001|4002|4003|4004|4005|4006|4007|4008|4009|400a|400b|400c|400d|400e|400f|4010|4011|4012|4013|4014|4015|4016|4017|4018|4019|401a|401b|401c|401d|401e|401f", TAG+="uaccess", TAG+="udev-acl", MODE="0660", GROUP="plugdev"
EOF

udevadm trigger
udevadm control --reload-rules

https://github.com/ArkEcosystem/ledger/blob/develop/scripts/udev.sh

usage:
sudo bash ./udev.sh

[Sajjon]

TL;DR: Quit macOS desktop app Ledger Live if it is running

Running macOS (host), not using Docker/Python virtualenv, I wanted to delete a Ledger App I previously had installed with python -m ledgerblue.App. In my Terminal I tried running:

python -m ledgerblue.deleteApp --targetId 0x31100004 --appName NAME_OF_APP_TO_DELETE

(where 0x31100004 is the id of a Ledger Nano S, with firmware 1.6.0)

That resulted in an error:

Generated random root public key : b'0481ba79845ad171de2c0f0e38badfbaeede3ec022e7dd8cf5edc406af06d3f6ee10100649bfbcfeb76ac062d41f327afe6532dd45f430fe0febcbd734a549151f'
Traceback (most recent call last):
  File "~/.pyenv/versions/anaconda3-5.3.0/lib/python3.6/runpy.py", line 193, in _run_module_as_main
    "__main__", mod_spec)
  File "~/.pyenv/versions/anaconda3-5.3.0/lib/python3.6/runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "~/.pyenv/versions/anaconda3-5.3.0/lib/python3.6/site-packages/ledgerblue/deleteApp.py", line 75, in <module>
    dongle = getDongle(args.apdu)
  File "~/.pyenv/versions/anaconda3-5.3.0/lib/python3.6/site-packages/ledgerblue/comm.py", line 216, in getDongle
    dev.open_path(hidDevicePath)
  File "hid.pyx", line 72, in hid.device.open_path
OSError: open failed

I tried using sudo python -m ..... but did not help. Then I realized that I had the Desktop app Ledger Live running, after I quit that and rerun the command, it succeded! And I was able to uninstall the app.

[menxit]

TL;DR: Quit macOS desktop app Ledger Live if it is running

Running macOS (host), not using Docker/Python virtualenv, I wanted to delete a Ledger App I previously had installed with python -m ledgerblue.App. In my Terminal I tried running:

python -m ledgerblue.deleteApp --targetId 0x31100004 --appName NAME_OF_APP_TO_DELETE

(where 0x31100004 is the id of a Ledger Nano S, with firmware 1.6.0)

That resulted in an error:

Generated random root public key : b'0481ba79845ad171de2c0f0e38badfbaeede3ec022e7dd8cf5edc406af06d3f6ee10100649bfbcfeb76ac062d41f327afe6532dd45f430fe0febcbd734a549151f'
Traceback (most recent call last):
  File "~/.pyenv/versions/anaconda3-5.3.0/lib/python3.6/runpy.py", line 193, in _run_module_as_main
    "__main__", mod_spec)
  File "~/.pyenv/versions/anaconda3-5.3.0/lib/python3.6/runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "~/.pyenv/versions/anaconda3-5.3.0/lib/python3.6/site-packages/ledgerblue/deleteApp.py", line 75, in <module>
    dongle = getDongle(args.apdu)
  File "~/.pyenv/versions/anaconda3-5.3.0/lib/python3.6/site-packages/ledgerblue/comm.py", line 216, in getDongle
    dev.open_path(hidDevicePath)
  File "hid.pyx", line 72, in hid.device.open_path
OSError: open failed

I tried using sudo python -m ..... but did not help. Then I realized that I had the Desktop app Ledger Live running, after I quit that and rerun the command, it succeded! And I was able to uninstall the app.

Great, thank you :) !