Ahh, OK I see. I had previously tried changing the Spool deserializer from LINE to Blob. My source is limited to max of 5000 'records', so RAM demands are low. That enabled me to use Regex to eliminate newlines and aggregate lines into 'records', but I got errors complaining that I could not create multiple output events from one (blob) input events.   Perhaps I can serialize the single aggregated output blob into individual 'records' at the Sink. Or, a custom ND JSON deserializer to use with the Spool that emits JSON 'records' the way I want them.   Thank you very much for straightening me out on readMultiLine.   Carter   ... View more