ValueError: not open

Crash Report

This crash report was reported through the automatic crash reporting system 🤖

Traceback

  File "electrum\plugin.py", line 362, in wrapper
  File "electrum\plugin.py", line 355, in run_in_hwd_thread
  File "concurrent\futures\_base.py", line 435, in result
  File "concurrent\futures\_base.py", line 384, in __get_result
  File "concurrent\futures\thread.py", line 57, in run
  File "D:\[.]Externe Programmdaten\Electrum\electrum\plugins\safe_t\clientbase.py", line 164, in cancel
    self.transport.write(self.proto.Cancel())
  File "safetlib\transport_hid.py", line 151, in write
  File "safetlib\protocol_v1.py", line 48, in write
  File "safetlib\transport_hid.py", line 159, in write_chunk
  File "hid.pyx", line 82, in hid.device.write

ValueError: not open

Reporter

This issue was reported by 4 user(s):

Additional Information

I installed "python-2.7.18.msi" to "C:"
and then "PIL-1.1.7.win32-py2.7.exe" to
"C:\Python27\Lib\site-packages".
In the Electrum Bitcoin wallet I get the information:
"The PIL package required for this is not installed - please install it to use the function."

The question is: What can I do? :^)

Start with electrum/plugins/safe_t/clientbase.py at cancel(), then trace the call through electrum/plugin.py and safetlib's HID transport files. Reproduce the reported cancellation path on a supported setup and determine the conditions that leave the HID device closed. Done means the reported ValueError no longer occurs in that path, with a regression test if the project supports one.