To match .* across multiple newlines, use the //s switch: 
if ($test_data_001 =~ /^__BEGIN_DATA__\n(.*)\n__END_DATA__$/s) { 
   # some action
}

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The //s switch treats the whole string as a single line by allowing . to match a newline.

-Mark

In reply to Re: Extract data from a line with multiple newlines in it by kvale
in thread Extract data from a line with multiple newlines in it by sureshr

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