[HAPI-devel] How to get null in the generated message?

[Ackley, K. A <kei...@ed...>]

Hi,

I'm trying to send a null value, which should be transmitted as two double
quote marks (""). I have tried calling setValue with null and with "". It
does not appear to work for any type. For example, I have tried

ca.uhn.hl7v2.model.v24.datatype.NM value = new
ca.uhn.hl7v2.model.v24.datatype.NM()
value.setValue(null);

And 

ca.uhn.hl7v2.model.v24.datatype.NM value = new
ca.uhn.hl7v2.model.v24.datatype.NM()
value.setValue("");

Both approaches result in the value being omitted from the generated
message. How do I get the parser to produce ""?

Thanks,
Keith