https://community.blueprism.com/t5/Product-Forum/Overwrite-Collection/m-p/78363#M30400 Yeah, I was referring to the latter case. Thanks for your help. Tue, 12 Jun 2018 20:25:00 GMT SaraanshArya 2018-06-12T20:25:00Z https://community.blueprism.com/t5/Product-Forum/Overwrite-Collection/m-p/78361#M30398 I have two collections, Coll A and Coll B. Initially, both these collection have different fields and data. I want to overwrite Coll A with Coll B, such that finally both the collections are identical. Is this possible? Tue, 12 Jun 2018 12:12:00 GMT https://community.blueprism.com/t5/Product-Forum/Overwrite-Collection/m-p/78361#M30398 SaraanshArya 2018-06-12T12:12:00Z https://community.blueprism.com/t5/Product-Forum/Overwrite-Collection/m-p/78362#M30399 If B is undefined (ie has no defined fields) then a simple calc with the expression [Coll A] will work. But if B does have a predefined column structure, then you won't be able to set it using A, unless A has the same structure. Tue, 12 Jun 2018 18:49:00 GMT https://community.blueprism.com/t5/Product-Forum/Overwrite-Collection/m-p/78362#M30399 John__Carter 2018-06-12T18:49:00Z https://community.blueprism.com/t5/Product-Forum/Overwrite-Collection/m-p/78363#M30400 Yeah, I was referring to the latter case. Thanks for your help. Tue, 12 Jun 2018 20:25:00 GMT https://community.blueprism.com/t5/Product-Forum/Overwrite-Collection/m-p/78363#M30400 SaraanshArya 2018-06-12T20:25:00Z https://community.blueprism.com/t5/Product-Forum/Overwrite-Collection/m-p/78364#M30401 @Saraansharya, if you needed to, I think you could accomplish this dynamically using the Utilitiy - Collection Manipulation VBO that's comes with BP. Specifically use 'get Collection Fields' on Coll B, and then 'rename Collection fields' on CollA.  If the data types don't match, maybe merge/transpose to temporary Coll C?  Sat, 14 Jul 2018 05:06:00 GMT https://community.blueprism.com/t5/Product-Forum/Overwrite-Collection/m-p/78364#M30401 NoahSommerfeld 2018-07-14T05:06:00Z