Date:	Tue, 16 Jun 92 12:18:57 JST
From:	Stephen Turnbull <turnbull AT shako DOT sk DOT tsukuba DOT ac DOT jp>
To:	norm AT theory DOT lcs DOT mit DOT edu
Cc:	djgpp AT sun DOT soe DOT clarkson DOT edu
Subject:	UNZIPPING djgcc201.zip

Norm--
    You may have been caught in the same trap I was.  I was trying to get
DEmacs from the 'wustl' mirror of the 'SIMTEL20' archives, and having
problems with PKUNZIP.  This resulted in the following exchange between
DEmacs' creator Hirano and Keith Petersen of the SIMTEL20 archives:

> hirano AT tkl DOT iis DOT u-tokyo DOT ac DOT jp (HIRANO Satoshi) wrote:
> > I am a creater of Demacs, DOS version of GNU Emacs. I got some mails
> > from my customers that saying files under /mirrors/msdos/demacs in
> > your archive is broken. Please check correctness of zip files.
> 
> The files are good on OAK.Oakland.Edu and SIMTEL20 as well.  The people
> who claim that those ZIPs are bad are the people who don't have the
> latest PKUNZIP.  Version 1.10 is needed to extract all ZIP files in the
> SIMTEL20 collection.  The Info-ZIP group's UNZIP41 will also work.
> 
> In every case of such complaints I have received, it has been determined
> that the person was trying to use PKUNZIP version 1.02 or earlier to
> extract the files.
> 
> Keith Petersen
> Maintainer of the MSDOS, MISC and CP/M archives at SIMTEL20 [192.88.110.20]
> Internet: w8sdz AT TACOM-EMH1 DOT Army DOT Mil     or       w8sdz AT vela DOT acs DOT oakland DOT edu
> Uucp: uunet!umich!vela!w8sdz                          BITNET: w8sdz AT OAKLAND

My bug report was sufficiently confused that I'll just condense the symptoms
here:  when UNZIP'ing files created by PKZIP 1.10, PKUNZIP 1.02 reports a
damaged file.  However, when you test the file, it says that you need only
PKUNZIP 1.0 to UNZIP it.  This is false; you often need ver. 1.10.  This is
a bug in PKZIP 1.10.  Also, despite what Petersen wrote, it is often 
possible to UNZIP SIMTEL20 files (at least on the 'wustl' mirror archive)
using earlier versions.  I guess this is because those files were ZIP'ed
using the earlier version, and not reZIP'd, or the use of ver. 1.10 features
may be intermittent.

If this isn't your problem, check the usuals:  all downloads were done in 
binary mode, etc.

Steve Turnbull
Institute of Socio-economic Planning
University of Tsukuba
Tsukuba, Ibaraki 305 Japan
turnbull AT sk DOT tsukuba DOT ac DOT jp
"We are *not* a dating service for economists."

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