>The GetTempPath function checks for the existence of environment variables in the following order and uses the first path found:
>- The path specified by the TMP environment variable.
>- The path specified by the TEMP environment variable.
>- The path specified by the USERPROFILE environment variable.
>- The Windows directory.
>
>Check TEMP and TMP environment variables. It might happen, some application sets them when your computer starts.

I think I solved this.

It seems that SYS(2023) returns VFP IDE Tools/Options/File Locations/Temporary files setting. This is undocumented.