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No ULINK Device Found

First I'd like to say that I'm new to uVision and to the stm32F4-Discovery board.

I'm currently using uVision with the stm32F4-DISCOVERY board and expansion pack which includes a camera. I found the camera driver online but I'm running into trouble when I try to download it to flash memory on the discovery board using a USB cable. Both projects will compile without issue, and I can download an example project without issue, but when I switch to the camera driver project it gives me two errors.

The first one says: "No ULINK Device Found."
And the second says: "Error: Flash Download Failed - Target DLL has been canceled."

Can someone please help me with this problem? I can't figure out why one project works fine but the other runs into problems.

Thanks,
Jacob

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