>>What's the record length here? -- you didn't mention it, but that plays as big a role as anything...
>
>Master file: 331 bytes
>Detail file: 862 bytes

That will break the bank, I think, if you're doing both tables at once. There can be two copies of each table, one temp, and one final output, and that sum is more than your space...I've been through this several times myself, where I had to divide the process to create sufficient space...or you can do it on a server, if you have one available...