[EpiData-list] double entry checking by key field

I am checking the entry in some files using the double entry verification. The data are from a family study so the unique identifying information is a family ID (4 digits), an individual ID (2 digits), and informant ID (in some cases, people will be reporting on others. Each data record, then, is uniquely identified by these 8 digits. I created a key for the entry check file as follows:

rhinf RANGE 1 99 MUSTENTER after entry rhukey=famid*10000+indid*100+rhinf end END

rhukey noenter key unique end

This works fine to prevent entering the same record twice.

I'm trying to use the variable rhukey as the match variable in the double entry program. I have intentionally entered non-matching data, but Epidata doesn't recognize any discrepancies. Is there a problem with a key that is created in the dbl file as well as in the original file?

Thanks.

Richard Herrell NIMH

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