Usually I use SYS(2023) to get the temp folder path and that is reliable regardless of the OS and user profile settings. However, a smiliar result could be obtained by getenv('temp') command whose remarks section in the online help says:
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Remarks
Two environment variables are always available: COMSPEC and PATH. You can create your own environment variables with the MS-DOS SET command.
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My Question: are there any circumstances under which GETENV('TEMP') will return empty strings or incorrect results?

Best Regards,
Bob