Hi,

I am using IBM-SPSS V24. I am experiencing a weird problem. When I copy any variable from 1 data set to another, the copying seems to work fine; but it reduces (and in some variables increases) the number of valid cases. For instance,  in the original data set, I have 1028 valid cases. But when I copy it to a new data set the number of cases reduces to 978.

The data set is in this form, i.e., 1=Yes, and 2=0. 

Any help in this regard would be highly appreciated.

Thank you.

Mustunsir

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