User missing values vs. system missing values

[programistawpf]

Unfortunately, after importing the data from the sav file, there are no user missing values. They are all in the form of NA analogically to the missing system data.
The package would be fully functional if import returned data as it is now, and a variant with original user missing values (i.e. 9, 99, -1). Then everyone could map the available data for use.
Paul