I keep getting this message, but have plenty of free hard disk space. I read somewhere to "set option sql_big_table =1", so that it can use disk space instead of runnig out of temp in-memory space. Well, I did this and I am still getting this error. How can I get past this problem?

Someone please help. I posted a question once before and I never got an answer. I hope this time someone is able to help, otherwise I will have to find other mySQL resources.