I'm having this same issue, except that I am using Windows 8 and the latest version of CGMiner (3.1.1, I think). I have AMD SDK 2.7 and Catalyst 13.1 drivers. I am pretty sure my .conf file is formatted correctly, and I do have settings for "thread-concurrency" : "21712,21712", and "kernel" : "scrypt" and "lookup-gap" : "2,2" in the .conf file. I am running two 7950 GPUs. I have read the scrypt readme file.
What am I doing wrong??
There is only one thread concurrency and look-up-gap value... it is for all cards... That is high, by the way, and an odd setting. I thought they had to be power-of-two... 1024, 2048, 4096, (8192)default, 16384, 32768, 65536
I get that error if I put a non-power-of-two value, or a value higher than 8192 with my 7970's. (My PCIe slots turn into (8x/8x/4x) with 3+ cards installed... but 1x risers used on all cards.) Thus, my setting has to stay as 4096 for stability.
