This behavior only occurs when the encrypted drive is mounted, not when it is attached but not mounted, it also does not happen when a truecrypt container/file is mounted.īehavior occurs on windows XP, any of the Calibre 0.6.x series, TrueCrypt 6.2a and earlier.
TypeError: unsupported operand type(s) for +: 'NoneType' and 'str' Unsupported operand type(s) for +: 'NoneType' and 'str'įile "calibre\gui2\device.pyo", line 57, in runįile "calibre\gui2\device.pyo", line 199, in _booksįile "calibre\devices\prs505\driver.pyo", line 103, in books If this device is mounted via truecrypt, calibre fails to detect the reader properly when it is subsequently attached (reader shows up with 0KB mem, card is not detected, get the following error:ĮRROR: Error: Error communicating with device I have an external USB hard drive entirely encrypted (so not a separate truecrypt container on a partition, nor a encrypted partition, but a device-hosted truecrypt volume) using TrueCrypt's volume creation wizard and choosing the 'encrypt a non-system partition/drive' option. This may be an unusual/edge case, I don't know.
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