Hi @Shu, Thanks for your suggest solution, but it doesn't work in my set up. I might have 100 flow files coming out of duplicate relationship of DetectDuplicate processor. 50 of them will have A.txt filename while the rest will be B.txt. The expected output would be A (1).txt, ..., A (50).txt and B (1).txt, .., B(50).txt. Since the number of flow files is not a fixed number, I can't really reset the state value. They all have the same ${segment.original.filename} value by the way. If there are another 10 flow files with A.txt coming out of DetectDuplicate processor with a different ${segment.original.filename} value, then these flow file should be named from 1 to 20.
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