Cyril,

The Config.fpw is a configuration file, not a program. You cannot use any VFP expressions in it.
You're trying to assign string 'SYS(2023)' to TMPFILES. VFP silently ignores it because it's not a valid path. IOW, it doesn't do anything so you can remove it.

>
>In config.fpw I have:
>

TMPFILES=SYS(2023)

>
>So when running on Citrix, should I tell them to remove this line from config.fpw?
>
>Or should they leave it in, but assign a different TEMP folder to each user?
>
>
>(VFP7)