Last day I got into a Exception "Notes Exception : The document is already exist in the collection".
This was a unfamiliar exception for me, and I am happy that google didn't give me answer for that.
LotusNotes usually give a loot of exception, but this was different from that. The problem was with NotesViewEntryCollection and NotesDocumentCollection. One of the Program was trying to convert NotesViewEntryCollection to NotesDocumentCollection directly by getting the viewentry and using the method .add() to NotesDocumentCollection. I dont know why that result the above error, may the problem of the implementation as well.
I believe that Direct casting(Convertion) of Domino objects are not so efficient as Java