Change: 
    my @fileNames = [ "manimp1.txt", "manimp2.txt" ];

[download]

to: 

    my @fileNames = ( "manimp1.txt", "manimp2.txt" );

[download]

The square brackets create a reference to an array. I think you just want to construct an array. See also:

In reply to Re: Opening an array of file names by toolic
in thread Opening an array of file names by tnyflmngs

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