>>What does FILETOSTR() do when it comes to these rules?
>>
>>I could just take the chance and see if there's a problem which I don't see happening but the system using this file is very critical so I can't afford to take the chance.
>>
>>Thanks.
>
>Usually there are problems with filetostr() if the file is already somewhere opened for write access. If you want to avoid conflicts, then you may check first whether the file is available and not used.

I came upon FileToStr() for situations like this because I needed a way to copy a file to a different directory, and Copy File was acting up on Excel sheets which were currently open, and FileToStr() and then StrToFile() was the solution.

That's all I know :).