Environment variables TEMP and TMP for temp dir
In addition to environment variable TMPDIR, TEMP and TMP are potentially used by the Project Manager to store temporary files. If one of these environment variables designates the absolute path of a directory, this directory is used to store the temporaty files. TMPDIR is checked first, then TEMP, then TMP. If none of those designates the full path of a directory, then the temporary files are stored in object directories.