I would suggest using regexes only to pull individual segments out of the transaction string. 
$PV1segment = ($transaction =~ /PV1.+?~/;

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assuming ~ is the segment terminator. Then, use split to break the segments into arrays. It is much easier than dealing with regexes, and takes advantage of the delimited structure of the data.

In reply to Re: Selecting HL7 Transactions by GotToBTru
in thread Selecting HL7 Transactions by BillDowns

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