Just got a fast machine and thought I'd take it for test spin. On
a real fast machine I couldn't generate a dup.

>>Just out of curiosity, I generated 40,000 numbers using SYS(3) in a loop on a 450 mhz machine (NT4.0, 96 mb ram) and I didn't get any duplicates. Strange...
>>
>Hi Raymond,
>
>Well, if I recall correctly, this thread started because someone has gotten duplicates. It was mentioned earlier that even the help file warns that this may be a possibility. Here's the quote from it (italics are mine):

>SYS(3) <I>may</I> return a non-unique name when issued successionally on a fast computer. Use SUBSTR(SYS(2015), 3, 10) to create unique, legal eight character file name.