Hi Paul, Windows Vista + 7 store so called 'shadow copies' of files, this enables the OS to offer older versions of a certain file. Look into Windows Help or ask PC Soft Tech Support. Imho HCreationIfNotFound(..) is the wrong command anyway. Most primitive way for HF Classic is to look whether the file is present by fFileExist(..) and if not, to do an HCreation(..) of the file otherwise a simple HOpen(..). In old times it had been revealed that HCreationIfNotFound(..) is too slow for opening the files of a medium-sized analysis. Furthermore, HOpen(..) offers a lot of information by error codes where HCreationIfNotFound(..) is a bit reduced in that respect plus it offers a delayed opening of files which, in some specific situations, can lead to problems somewhere deep in your code. Kind regards, Guenter