libusb error code -32(decimal)

[Forrest Myers]

I've been trying to find out the meaning of the error code -32 that I 
get when I call the usb_control_msg(); . The actual call looks like: 
ret = usb_control_msg(
                    devh,
                    VENDOR_REQ_TYPE_OUT,
                    VENDOR_REQ_I2C_WRITE,
                    i2c_addr,
                    0,
                    byte,
                    length,
                    USB_TIMEOUT_MSECS
                    );
 In this module, various calls to usb_control_msg() have been done and 
they all work fine.  If I knew what the -32 stood far, I'd have a better 
chance of figuring out the problem. From all the documentation I can 
find, the error codes run from -1 to -14.

Forrest