>Hi Everybody,
>
>To generate a unique record id value, in lieu of using either:
>
>1. the AUTOINC field type
>2. using a table that houses a LastNumber field and have a GetLastNumber() function to lock and return value.
>
>Will using SYS(2015) do the job? I mean, is its uniqueness 'guaranteed' if its being invoked by 100 or more workstations simultaneously?

Yes and no. It's guaranteed per workstation, not across network - so if you prefix it with some sort of workstation code, it will be.