If your actual data has any whitespace at the end (other than the newline), then that could explain why you are seeing no output. When I download your data, there is no extra whitespace, but perhaps it got cropped off when you posted it (or when I downloaded it). Perhaps try looking for extra whitespace using: 
@tmpHeader = grep /^Test\s+\d+\s+of\s+\d+\s*?$/../^\d+\s+end$/, @allDa
+ta;
                                         ^^^^

[download]

In reply to Re: grep using regex by toolic
in thread grep using regex by xingjin3131

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