https://community.blueprism.com/t5/Product-Forum/Unable-to-Store-Value-in-collection-inside-a-collection/m-p/63111#M16104 To add values to inner collection you need to create another collection similar to inner collection with all fields same as inner collection and then all the values to the new collection and at the end just add the new collection to the Main colllection which contains inner collection  EX: lets say ""MAIN"" is name of collecton which contains one of the field of type Collection named as ""INNER"".now create a new collection as NEW and add all values to it and at the end with the help of a calculating stage just Store ""NEW"" in ""MAIN.INNER Mon, 07 May 2018 16:07:00 GMT Srikanth_ReddyK 2018-05-07T16:07:00Z https://community.blueprism.com/t5/Product-Forum/Unable-to-Store-Value-in-collection-inside-a-collection/m-p/63110#M16103 Hi, I've created a Collection inside a Collection and when I wish to store a value in it by using a Calculation Stage it shows error "Field not Found". anybody knows how to store a value in this. Fri, 04 May 2018 19:36:00 GMT https://community.blueprism.com/t5/Product-Forum/Unable-to-Store-Value-in-collection-inside-a-collection/m-p/63110#M16103 NoorulAmeen 2018-05-04T19:36:00Z https://community.blueprism.com/t5/Product-Forum/Unable-to-Store-Value-in-collection-inside-a-collection/m-p/63111#M16104 To add values to inner collection you need to create another collection similar to inner collection with all fields same as inner collection and then all the values to the new collection and at the end just add the new collection to the Main colllection which contains inner collection  EX: lets say ""MAIN"" is name of collecton which contains one of the field of type Collection named as ""INNER"".now create a new collection as NEW and add all values to it and at the end with the help of a calculating stage just Store ""NEW"" in ""MAIN.INNER Mon, 07 May 2018 16:07:00 GMT https://community.blueprism.com/t5/Product-Forum/Unable-to-Store-Value-in-collection-inside-a-collection/m-p/63111#M16104 Srikanth_ReddyK 2018-05-07T16:07:00Z