Cyclone III Fails configuration on some of my boards!?!

Thanks for the reply. We're a security company and the devices we build end up getting security bits burned, and JTAG interfaces aren't available after it's all assembled. (In this case, it's pinned out to pogo pads, which are potted over and made unavailable.) The "debug" board was all splayed out, and when we put one together as it really would be used, the config issues started up. :(

The assembly process for the final device would be to program the EPCS on an external programmer... solder it down, and pot the whole board with an epoxy for physical security. It makes it kind of hard to debug at that point, and that's what I'm dealing with today. I'm leaning toward thinking it's an assembly issue or board yield issue. But I don't want to rule anything out and waste boards.

Thanks again for the reply and help.