G'day kaldor,

As far as I can tell, there is no tail command on Windows:

Microsoft Windows [Version 10.0.19045.2486]
(c) Microsoft Corporation. All rights reserved.

C:\Users\ken>where tail
INFO: Could not find files for the given pattern(s).
[download]

So that's Win10; perhaps you're using a different version. In "stackoverflow: A Windows equivalent of the Unix tail command", a number of emulators are referenced; maybe you're using one of those. Whatever the situation, some additional information regarding this would be helpful in getting an answer.

You could take a look at File::Tail. I note that "CPAN Testers Matrix: File-Tail 1.3 (latest distribution)" shows many tests against Perl versions running on "mswin32", all of which are successful.

See also: "open(): Opening a filehandle into a command" (and the links from there, especially those to perlipc).