[OS X TeX] Help: an envlab problem

[Vic Norton]

I am having problems with the envlab package. I wonder if anyone on this
list can tell me what is wrong.

Here is my problem. I want to write a 200+ mailing labels on Avery 5160
label sheets (10 rows per page, 3 labels per row). I believe the
appended code should produce nine labels--three rows of three labels.
However, when I run the code in TeXShop, I see eight labels--two rows
of three labels and one row of two. The fourth label
   Joe Casanova
   04 Lambda Street
   Anyplace, NY 12345
is missing. Apparently this label has been lost in the boondocks of the
first row. This is indicated by the error message:
   Overfull \hbox (188.50822pt too wide) in paragraph at lines 11--20
If put a "\\" at the end of the "03" line below, the overfull message
disappears and the "04" address above suddenly appears on a new
address row of its own.

My code is appears below. In addition I am attaching a log of the
corresponding TeXShop session. Thanks for any help you can give me.

Regards,

Vic Norton

## code ##

\documentclass[12pt]{letter}
\usepackage[avery5160label,noprintbarcodes,nocapaddress]{envlab}
\usepackage{geometry}
\geometry{
  hmargin={0.0in, 0.0in}, vmargin={0.5in, 0.0in}
}
\makelabels

\begin{document}

\mlabel{}{Joe Casanova\\01 Lambda Street\\Anyplace, NY 12345}
\mlabel{}{Joe Casanova\\02 Lambda Street\\Anyplace, NY 12345}
\mlabel{}{Joe Casanova\\03 Lambda Street\\Anyplace, NY 12345}
\mlabel{}{Joe Casanova\\04 Lambda Street\\Anyplace, NY 12345}
\mlabel{}{Joe Casanova\\05 Lambda Street\\Anyplace, NY 12345}
\mlabel{}{Joe Casanova\\06 Lambda Street\\Anyplace, NY 12345}
\mlabel{}{Joe Casanova\\07 Lambda Street\\Anyplace, NY 12345}
\mlabel{}{Joe Casanova\\08 Lambda Street\\Anyplace, NY 12345}
\mlabel{}{Joe Casanova\\09 Lambda Street\\Anyplace, NY 12345}

\end{document}

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