. clear

.
. cd "C:\Program Files (x86)\Stata14\ado\personal\Net_course_A"
C:\Program Files (x86)\Stata14\ado\personal\Net_course_A

.
. unicode analyze A2data.do
could not create ./bak.stunicoder(693);

.
. unicode encoding set gb18030
  (default encoding now gb18030)

.
. unicode translate A2data.do, invalid
  (using gb18030 encoding)
could not create ./bak.stunicoder(693);