Handling NULL value in MDM Import manager

Hi all,

I am getting a value in Soruce field as (1,Null,Null). Butt MDM dosent understands and maps to NULL value . So no value is populated in Data MAanger even we have value 1 in (1,Null,Null)

It expects as <Null> instead of Null.

if i give 1, <Null>,<Null> using Replace fucntion replacing 1,Null,Null then it accpets and maps automatically.

Is there any trick requires in Configuratio or in field level in Import manager to handle this value Null.??

Thanks

Pradeep