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Thanks Mofi that worked. My replacement was \1\2 and it worked. I could've made the asterisk at the end a look ahead and thus just would've needed \1 as the replacement. Thanks for the tip on the embedded parentheses trick. (SVC\*HC(?::\w{2,})+):\w (?=\*)

Is there a way to rewrite the following regex so the replacement becomes defined. My understanding is embedded parentheses cause the replacements \1, \2, etc. to become undefined. ( SVC\*HC ( :\w{2,} ) + ) :\w(\*) Sample entries this should match. The part in red should be deleted in the replacement...

Use as Perl regular expression search string (\*[MN]\d+)(?:\1)+~ and as replace string \1~ Thank you very much that works. Your explanation will be beneficial to my future "attempts" at finding these complicated streams. I did not know backreferencing using the Unix engine in Find did not work. Sho...

Thanks for looking into it. It finds all of these matches in my test file below but the only valid one is the last. MOA***N657~ MOA***M15~ MOA***N657~ MOA***N657*M15~ MOA***N30~ MOA***N30~ MOA***N30~ MOA***M15*M15*M15~ Do you have any other suggestions?

I need to replace this line: MOA***M15*M15*M15~ with: MOA***M15~ How can I write a generic expression as M15 could change. It could be N121*N121*N121*N121 and so forth. The count could also change. For example it could be duplicated 2, 3, 4, or more times. Thanks.