各位大神，求助一个stata的问题
已经set mem 200m，perm
set maxvar 32767，perm了，为什么每次打开数据文件还是出现下面 这堆东西啊，perm的意思不是下次激活不用重新设置么？
no room to add more observations
    An attempt was made to increase the number of observations beyond what is currently possible.  You have the
    following alternatives:
     1.  Store your variables more efficiently; see help compress.  (Think of Stata's data area as the area of a
         rectangle; Stata can trade off width and length.)
     2.  Drop some variables or observations; see help drop.
     3.  Increase the amount of memory allocated to the data area using the set memory command; see help memory.
r(901);