我已经将mem 设置到1G,变量20个,但还是得不到结果。这怎么处理呢?跪求解答。
Building GMM instruments.no room to add more variables because of width
An attempt was made to add a variable that would have increased the memory required to store an observation beyond what is currently
possible. You have the following alternatives:
1. Store existing variables more efficiently; see help compress.
2. Drop some variables or observations; see help drop. (Think of Stata's data area as the area of a rectangle; Stata can trade off
width and length.)
3. Increase the amount of memory allocated to the data area using the set memory command; see help memory.