I am using zc 1.38a. I have many items with many option in my store. So, it is taking some effort to manage my attributes. I added 'stock by attributes' without any problem. I then tried to add 'attributes separate stock'. That is where the problem arouse. I couldn't get it to work. I tried to remove the files that I uploaded. Now I get a 404 error when I try to access the stock by attributes area. On my product info pages, the attribute options are no longer visible. I have read the manual and searched the forum. It seems that many of us are having problems with the attribute options. But, I have not seen this specific problem addressed. I hope that there is some one out there who can help me.