Does Unix join have a limit on the number of lines?

From	Robert Peirce <bob@peirce-family.com>
Newsgroups	comp.sys.mac.programmer.misc
Subject	Does Unix join have a limit on the number of lines?
Date	2021-01-30 12:28 -0500
Organization	Aioe.org NNTP Server
Message-ID	<rv450m$1hu0$1@gioia.aioe.org> (permalink)

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I just discovered a join command I have been using for years stopped 
working on 11/27.  The command is

join -a1 ~/daily/Input ~/weekly/Input

What I am trying to do is join the date matched daily and weekly lines 
but include all the daily lines.  The data exists to date but the join 
stops at 11/27.

The file structures haven't change.  Nothing has changed as far as I can 
tell.  The output includes all the daily lines but doesn't include any 
of the weekly lines after 11/27.  I have no idea why.

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Does Unix join have a limit on the number of lines? Robert Peirce <bob@peirce-family.com> - 2021-01-30 12:28 -0500
  Re: Does Unix join have a limit on the number of lines? Robert Peirce <bob@peirce-family.com> - 2021-01-30 12:48 -0500
    Re: Does Unix join have a limit on the number of lines? Robert Peirce <bob@peirce-family.com> - 2021-01-30 14:14 -0500

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