When I run your code, it works for me. The 1st time I ran it, it created a file named 'huntlog.log' and it contained the line 'Log start...'. Every subsequent time I ran it, it appended the same line to the file, as desired.

Try checking if print fails: 

print LOG "Log start... \n" or die "wtf: $!";

[download]

See also suffering from buffering

In reply to Re: writing to a log file.... by toolic
in thread writing to a log file.... by biswanath_c

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