I assume it's just an example snippet, but be aware that 00000001.610 and "00000001.610" are very different. 
perl -le 'sub x{print shift}; x("0000001.610")'  # 0000001.610
perl -le 'sub x{print shift}; x(0000001.610)'    # 1610

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In reply to Re: How Do I Use Net::FTP by davidrw
in thread How Do I Use Net::FTP by Doyle

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