AttributeError: 'Driver' object has no attribute 'epo'

[vstadnytskyi]

2019-11-13 17:23:12,384 ERROR: Traceback (most recent call last):
File "/home/icarus-0/NMR-Pressure-Jump/Software/XLI/drivers/DI4108/DI4108_BULK_driver.py", line 162, in write
self.dev.write(self.epo,command)
AttributeError: 'Driver' object has no attribute 'epo'

2019-11-13 17:23:14,678 ERROR: Traceback (most recent call last):
File "/home/icarus-0/NMR-Pressure-Jump/Software/XLI/drivers/DI4108/DI4108_BULK_driver.py", line 147, in read
data = self.dev.read(self.epi,usb_buff,timeout)
File "/home/icarus-0/.local/lib/python3.6/site-packages/usb/core.py", line 988, in read
self.__get_timeout(timeout))
File "/home/icarus-0/.local/lib/python3.6/site-packages/usb/backend/libusb1.py", line 833, in bulk_read
timeout)
File "/home/icarus-0/.local/lib/python3.6/site-packages/usb/backend/libusb1.py", line 936, in __read
_check(retval)
File "/home/icarus-0/.local/lib/python3.6/site-packages/usb/backend/libusb1.py", line 595, in _check
raise USBError(_strerror(ret), ret, _libusb_errno[ret])
usb.core.USBError: [Errno 110] Operation timed out