https://community.blueprism.com/t5/Product-Forum/Writing-Value-to-a-nested-collection/m-p/74143#M26748 Hi Abhishek - because you can reference a nested field like [A.B.C.D] in an expression, your coding experience would assume you could use A.B.C.D as the Store In value of a calculation. Unfortunately at present this is not the case, and you need to unpack each layer - see screenshot. We know this is unintuitive and far harder than it should be, and it's on our developers' change list. Wed, 31 Jan 2018 14:54:00 GMT John__Carter 2018-01-31T14:54:00Z https://community.blueprism.com/t5/Product-Forum/Writing-Value-to-a-nested-collection/m-p/74142#M26747 Hi, I have a collection data item called 'A'. This collection has a field 'B' of data type as collection. The collection 'B' has a field 'C' again of data type as collection. Collection 'C' has a field of data type as Text. So, in all I have a three level collection.  I want to WRITE some value in 'D' field. But I am not able to do so. Hierarchy of the data item (for reference) A(collection) ->  B(collection) ->  C(collection) ->  D(Text) Kindly someone help me with this. Thanks Wed, 31 Jan 2018 12:00:00 GMT https://community.blueprism.com/t5/Product-Forum/Writing-Value-to-a-nested-collection/m-p/74142#M26747 Anonymous 2018-01-31T12:00:00Z https://community.blueprism.com/t5/Product-Forum/Writing-Value-to-a-nested-collection/m-p/74143#M26748 Hi Abhishek - because you can reference a nested field like [A.B.C.D] in an expression, your coding experience would assume you could use A.B.C.D as the Store In value of a calculation. Unfortunately at present this is not the case, and you need to unpack each layer - see screenshot. We know this is unintuitive and far harder than it should be, and it's on our developers' change list. Wed, 31 Jan 2018 14:54:00 GMT https://community.blueprism.com/t5/Product-Forum/Writing-Value-to-a-nested-collection/m-p/74143#M26748 John__Carter 2018-01-31T14:54:00Z