用deap计算全要素生产率怎么输出结果为空？

有可能是ins、dta、out文件的名字过长。我第一次使用也是这个问题，缩短文件名称就解决了。（PS:我用的是DEAP2.1软件）

“DEAP is a DOS computer program.  In DOS all file names must satisfy certain
restrictions:
        - no more than 12 characters
        - no more than 3 characters after the period (".")
        - no more than 8 characters before the period
That is, the largest possible file name has the form:
        XXXXXXXX.XXX
Since we use text files, the file name will always have "txt" after the
period.  That is:
        XXXXXXXX.txt”

请问你参考的什么书？

我也是这样，输出文件只有几行抬头，内容数据无。