It is a character expression that has a condition that evaluates to T/F.

".T."
".F."
"HepBStatus(id) = 4"

>What is in the "condition" field? I mean exactly, not what type of thing.
>
>Michelle
>
>
>>Same error "Function argument value, type or count is invalide" for all of these
>>
>>? eval(patient.condition)
>>? eval(patient->condition)
>>? eval(condition)
>>
>>>If you're getting the same error, I'd be willing to be that it has nothing to do with the dot notation. Did you try doing the EVAL on the command line and see what you get?