>>>For some reason, I'm stumbling trying to figure this one out, so I'm looking for suggestions.
>>>
>>>We have a file of interest rates which we are currently indexing on:
>>>

BankCode+DTOS(ValueDate)

>>
>>

BankCode+dtos(date()-ValueDate)

>>
>
>Nadya,
>Subtracting one date from another gives you the number of days between them. As such, DTOS() will thorw an error because it expects a date not a numeric.

He-he, I realized it immediatelly after I posted :) See my other messages in the same thread. Too bad, there is no UNDO button :)