At first I had the same problem.
It needs to be run directly from the command line for some reason.
Open command prompt - change the directory to the folder where your YAM.exe and cfg is and then run the following.
yam -c yam-mmc.cfg
It should run then with no problems.
I am sorry if you already covered this. I just read through the 5 pages with no luck finding a solution for me.
I am new to YAM, I have successfully ran all other miners (CPU/GPU alike) on all 7 of my pc's. I can not get YAM to run. First I wasnt sure which file to download, I tried, generic, barcelona and nehalem with no luck. I attempted to edit the example file like suggested in the readme. I saved, went into yam folder and clicked it. It just popped up and closed in all cases. I attempted to do a bat file, which I am comfortable with, not sure I did it right. Did the same thing.
I am not sure what I am doing wrong. Any assistance would be appreciated. I have 3-i5's and 3-i7's that I will be adding YAM too, once I am able to figure out how to use this program.
Windows 7 Pro 64bit
AMD Phenom II x4 B50 (K10 Architecture), Code Name Deneb with 4 gb
Thanks for any assistance,
Dave