As others have suggested, there are several hazards you will encounter when trying to pass parameters using the shell (system call).

Some of these are:

• Spaces in data
• Binary data
• structured data (AoA or HoA etc)
• Special chars in data like < ^ >

For a more general solution, you may want to consider using the storable Module, which can be used thus:

    #In Calling program
    use Storable; 
    store(\@array, "filename");

    # later , in Called program ..
    $aref = retrieve("filename");         # Get a ref or
    @array = @{ retrieve("filename") };   # direct into array
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