($nextline=~/$SearchString/)

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Is it maybe that you have the comparison wrong? You are comparing whether $nextline matches /$SearchString/. I interpret your description as that you want to stay in the loop while $nextline does not match /$SearchString/:

($nextline!~/$SearchString/)

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In reply to Re^3: reading lines from a text file by Corion
in thread reading lines from a text file by misba

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