Hi Caroline

>Is there a way to generate a unique file name in a multi user environment? I understand that Sys(2015) will do the job but if the file is to be saved to a network drive/share and two people go to create one at the same time, what is the outcome?

According to the Help File, even calls in the same millisecond interval generate different values:

"The name that SYS(2015) returns is created from the system date and system time. Calling SYS(2015) more than once during the same millisecond interval will return a unique character string."