@nifideveloper
You will need to use a NiFi Expression Language (NEL) statement to check if the date within the filename matches today's date.
So first thing is isolate from the filename just the date portion and then compare it the output from NEL "now()" function output formatted in same way as source filename date pattern.
Without a sample filename to work with, it would be difficult for me to provide an example NEL statement.
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Thank you,
Matt