Aaaah yes, you are correct.  Then this would indicate his device has no 
configuration descriptors.

Chuck

On 06/27/2012 09:57 AM, Alan Stern wrote:
> On Wed, 27 Jun 2012, Chuck Cook wrote:
>
>> Your config index is wrong.  Zero should not be used at all according to
>> the USB spec.   Try "1".
> No, that's not right.  0 is a perfectly good configuration index
> number.
>
> You're probably thinking of libusb_get_config_descriptor_by_value().
> 0 is not a valid configuration _value_ but it is a valid configuration
> _index_.
>
> Alan Stern
>
>
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threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/
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