In UniFlash 4.4.0 the directory where 'xds110reset' is changed.
Try to use the newest one available. If none is found in UNIFLASH_PATH,
try to use one from the PATH to be sure to have a value.
./uniflash_4.1/simplelink/gen2/bin/xds110reset
./uniflash_4.3.0/simplelink/gen2/bin/xds110reset
./uniflash_4.4.0/simplelink/imagecreator/bin/xds110reset
./uniflash_4.5.0/simplelink/imagecreator/bin/xds110reset