I can't seem to read the Manufacturer and Serial Number string from USB
devices.

I have tried :
    dev.open().getString( dev.iManufacturer, 30)

but i just get an error as follows.

usb.USBError: usb_control_msg(DeviceRequestTO): unknown error

What is my mistake ??

Is there some other sample pyusb code to read the Manufacturer and
Serial strings ??

Thanks, Brendan.

begin:vcard
fn:Brendan Simon
n:Simon;Brendan
org:eTRIX pty ltd
adr:;;PO Box 306;St Kilda;VIC;3182;Australia
email;internet:brendan.si...@etrix.com.au
title:Managing Director
tel;work:+61-417-380-984
tel;cell:+61-417-380-984
x-mozilla-html:TRUE
version:2.1
end:vcard

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