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usb film scanner problem code 38

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by edjal

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I have 2 usb scanners (visioneer 9020 & tamarack 2400FS)If I install only one scanner it works fine, but If I install both device mgr=code 38 "cant load device driver for this hardware because of a previous instance of device driver is still in memory" Using XP have latest Drivers for both scanners. Either scanner works singularly. How do I fix?

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by guruofdos

Ah.....the classic two scanners problem!

Firstly, if you connect the scanners via a non-powered hub, then you will not get them working together.

Secondly, if they are connected to the same USB controller, they will not work, hub or not.

The problem is the way that USB controllers enumerate devices and device classes. You will either have to use them separately (that is what USB hot swapping is all about) OR get an additional PCI usb controller card and use one scanner on each controller. That was the only way I could get two USB scanners to work simultaneously.

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