Transform(TTOC( DATETIME(),1), "@R XXXXXXXX_XXXX")
or
Chrtran( Dtoc( Date()) + "_" + LEFT(Time(),5), "/:", "")

>>>Hi everybody,
>>>
>>>I'm thinking about including datetime in the file name to identify files. How should I transform it?
>>>
>>>Thanks a lot in advance.
>>

TTOC( DATETIME(),1)

>
>Hi Sergey,
>
>I think, I want date in normal date format (e.g. monthdateyear), then _, then 1446. I don't need seconds.
>
>Anyway, I think, it's not important, so I probably just go with yours suggestion.