Thank you all for your responses. The problem has been solved. I have to specify the directory on the windows side as: 
my $destdir = '/C/Data/';

[download]
instead of 
my $destdir = "C:\\Data\\";

[download]

In reply to Re^3: Net::SCP can't connect to Windows server by perlfun
in thread Net::SCP can't connect to Windows server by perlfun

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