Magento • ERROR: unable to unpack

Article ID #1068
Revision: 1.8
Last update: 2011-10-16

Applies to Magento 1.4 installations

For Magento 1.5 version and above please check this article

Symptoms

The following error (or similar) is shown in Magento Connect Manager on installation/upgrade:

 

ERROR: unable to unpack downloader/pearlib/download/AW_Blog-1.0.21.tgz

 

Cause

There is a bug in current stable PEAR/Archive_Tar implementation resulting in impossibility to unpack archives made by certain software versions.

 

Solution

To fix it simply replace downloader/pearlib/php/Archive/Tar.php file with a patched version  or apply a patch from http://pear.php.net/bugs/bug.php?id=17578&edit=11.

 

The patch has been already applied for our new installations. If you notice this issue with your old Magento installation, please notify our Support Team to get this fixed.

 

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