I have a line sequential file that I am wanting to convert to an indexed file. This is just for my own edification. I am using the classic data tools to do the conversion. My index is the social security number which begins at position 32 and is 9 characters long. The sequential file has variable length records with a max length of 66 characters. When I do the conversion, it ask for minimum of 41 and max of 66 which I use. The conversion goes through without any problem. When I open the file using the data tools I can see the ssn highlighted as the primary key. However, when I read the file into my cobol program, I am constantly getting a 4/7 open error. Any suggestions on why this is happening or what I need to do differently when doing the conversion?