数据中没有缺失值，但提示如下，应如何修改？
The following lines were read from C:\Lassi2015\Lassi.PR2
!PRELIS SYNTAX: Can be edited
SY='C:\Lassi2015\Lassi.PSF'
SE 1 2 3 4 5 6 7 8 9 10
EM CC = 0.00001 IT = 200 TC = 0
OU MA=CM SM=Lassi.cov RA=Lassi.dsf XM

                        -------------------------------
                         EM Algoritm for missing Data:
                        -------------------------------

           Number of different missing-value patterns=        1
           **** No missing values detected
           **** Please ensure that a missing value code is defined