Option 1 Validate Archive
The process of moving the archive.zip/daf files across servers can corrupt the files. To quickly determine if the archive is valid try to extract it on yourlocal computer a program such as winzip, winrar, 7zip etc. If the client program errors during extraction then the archive.zip file has become corrupted either during the downloador the creation process. Proceed to option #2 if the client side program also errors. If the client side program works without issues then proceed to option #3.

Option 2 Validate Download Process

• FTP Downloads
  If you transferred via FTP make sure that the FTP client is in binary mode when transferring down to your local box and then also when it’s transferring back up toyour host or destination server. If you downloaded straight from the plugin interface then try the download one more time to make sure that the http transfer is clean.
• Web Server Downloads
  Check Web Server Configuration
  These problems usually indicate the web server it not allowing files to be written to the directory. A common solution is to edit the Apache virtual hosts fileand include the “AllowOverride All” instruction.
  Example:
  <VirtualHost *:80>
{various instructions}...
<Directory /var/www/html>
AllowOverride All
</Directory>
</VirtualHost>


Option 3 Change Archive Engine
On Step 1 of the installer under “Options” you can change the engine which tries to extract the archive. On some hosting providers you will have the abilityto use multiple extraction engines. By default almost every server will support “ZipArchive”, however some hosts also support “Shell Exec Unzip”. If you run into issuesduring the extraction process try to switch the archive engine from one format to the other.

Option 4 Manual Extraction
If for some reason the client side program works fine (see step #1) and neither of the archive engines work from step #3 then you may want to try a manual extraction of the archive file.

Option 5 Imunify360
If your server or host runs Imunify350 then its possible the software might cause issues with the extraction process. If so consider checking out this FAQ titledHow to fix installer validation checks? and See Problem-A.

Option 1This behavior should NOT happen and is usually caused by either a corrupted zip file or a zip file that was created with filenames that are too long. Below is a listof items/plugins that create file names that are too long.