Hi Manohar,
Could you please let me know, how you created this attribute, by referring to model node attribute/BOL Relation? Please provide the details.
Also you can get the account street address attribute using the below relationship
Root Object BuilContactPerson ->Association BuilGetHeaderforContactRel Child Cardinality 1 ->Aggregation BuilStandardAddressRel Child Cardinality 0..1 -> Attribute STR_SUPPL1
Thanks
Sudhansu