Can't build lpc_open examples.

I hope this is the right place to post this.

I am using Keil uvision 5.1 and lpc_open for keil lpc1857.

Following the quick start guide I loaded the peripheral example projects into uvision.

The 2 libraries build with no problem, but when I try to build any of the examples I immediately get the error:

Error: *** Device is not supported by Toolchain ! ***

Does anyone have a clue?

Thanks,
Dave Sidlauskas