Andy Little wrote "Martin Bonner" wrote ----Original Message---- From: boost-bounces@lists.boost.org [mailto:boost-bounces@lists.boost.org] On Behalf Of Andy Little Sent: 09 March 2006 08:09 To: boost@lists.boost.org Subject: Re: [boost] [bitfield] More portable implementation available inthevault

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"Emile Cormier" wrote

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Bitfield2.zip in

http://boost-consulting.com/vault/index.php?direction=0&order=&directory =bitfield&

Unfortunately my unzipper wont unzip it. Just says "unknown compression algorithm" or some such.

regards Andy Little

Curious. Have you tried downloading it again?

Yes. it still says unknown compression algorithm.

I have just opened it with WinZip 8.0 and it worked fine

When I'm feeling lazy I use the so-called Windows Extraction Wizard http://www.microsoft.com/resources/documentation/windows/xp/all/proddocs/en-... Select your file, Right Click and select "Extract All". That comes up with "unknown compression format." For big files the Wizards incredibly slow so I use PKZip 4.0 (PKZip having invented the format AFAIK). However PKZip crashes on this file. Comes up in the debugger with "Unhandled exception at 0x0043c90d in pkzipw.exe: 0xC0000005: Access violation reading location 0x43435542." My guess is that somebody has extended the original pkzip format and made that the default when compressing files, for whatever reason I dont know, or maybe the spec has been modified recently. Anyway I have had a couple of these files which dont seem to follow the original spec in the last couple of weeks and I can do nothing with them whatsoever except to delete them I'm afraid as they dont seem to be backward compatible with the original spec. regards Andy Little