HELP cgminer error "USB init, open device failed, err -12"

[Shotline]

I am hoping someone can help me with this.

I am running cgminer 3.6.6 no gpu (even with the regular cgminer I get the same errors) and am getting this continuous error:

USB init, open device failed, err -12, you need to install a WinUSB driver for - BLT device 4:2
Icarus detect (4:2) failed to initialise (incorrect device?)
USB init, open device failed, err -12, you need to install a WinUSB driver for -BTB device 4:2
avalon detect (4:2) failed to initialise (incorrect device?)

and it just keeps repeating over an over.

Other than this, cgminer is running perfect.  I have 4 AMU devices, am submitting shares, all working well except for this error.

I am on a windows 7 machine with an ATI Radeon HD 5450 but don't want to use the gpu for mining.  I have tried every version of cgminer and every one after 3.1.1 has this error.

Does anyone have an idea how to get rid of it or at least suppress it?

Thanks for any help you can provide.

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[petregr]

What hardware and OS do you use?

[btceic]

Download the zadig drivers

http://sourceforge.net/projects/libwdi/files/zadig/

Specifically this one:
http://sourceforge.net/projects/libwdi/files/zadig/zadig_v2.0.1.160.7z/download

Choose Options-->List All Devices from the main menu and choose one of the usb miners and click the install driver button.

reboot

run cgminer or bfgminer and you should be good to go.

[Shotline]

Download the zadig drivers

http://sourceforge.net/projects/libwdi/files/zadig/

Specifically this one:
http://sourceforge.net/projects/libwdi/files/zadig/zadig_v2.0.1.160.7z/download

Choose Options-->List All Devices from the main menu and choose one of the usb miners and click the install driver button.

reboot

run cgminer or bfgminer and you should be good to go.

This isn't a problem with the usb miners, they are working fine.  The issue seems to be with something else on my system that is not icarus nor avalon but cgminer thinks it is.

And I just found out what the item is.  I have a 3D printer and just pulled its usb cable and the errors stopped.  So now I need to figure out how to supress the messages or leave the printer unplugged when not in use.

[pontiacg5]

Not sure how much you care to fix this, but I think you can select specific USB devices by hardware addresses with CGminer. There's a section on it in the readme.

[Shotline]

Not sure how much you care to fix this, but I think you can select specific USB devices by hardware addresses with CGminer. There's a section on it in the readme.

It isn't going to be a priority but thanks for the advice.  I will check the readme.