Harvesting Issue

[Mital Ahir]

Dear Sir/Mam,

I am Mital Ahir from the National Digital Library of India. We are using Dspace 5.2 version. Problem is -- We have a Source(Data) in AIP format. Now we are ingesting this AIP data in different server. Ingestion process is successfully done. But when we start harvesting on it for a particular collection it is taking starting from ZERO. Example like -- One collection has [20] items. New [5] items are added in this collection by an external source. So when we start harvesting in our DSpace server, it's getting [45] items (20 - Exist & [20 + 5 = 25] ) . Actually, we want only [25] items (20 - exist and 5 -  increments). If you have any solution/suggestion regarding this issue, please help me through the mail.

Thanks a lot in advance.

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Thanks & Regards
Mital Ahir

National Digital Library of India

Indian Institute of Technology, Kharagpur - 721302