Title: Installing error
Last modified: August 21, 2016

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# Installing error

 *  [Sop](https://wordpress.org/support/users/sopt/)
 * (@sopt)
 * [12 years, 7 months ago](https://wordpress.org/support/topic/installing-error-4/)
 * Hi
    i’m guessing i have to install Gravity Forms first to get this to work?
 * error message:
    Unpacking the package…
 * The package could not be installed. PCLZIP_ERR_BAD_FORMAT (-10) : Invalid archive
   structure
 * [http://wordpress.org/plugins/gravity-forms-pdf-extended/](http://wordpress.org/plugins/gravity-forms-pdf-extended/)

Viewing 1 replies (of 1 total)

 *  Plugin Author [Jake Jackson](https://wordpress.org/support/users/blue-liquid-designs/)
 * (@blue-liquid-designs)
 * [12 years, 7 months ago](https://wordpress.org/support/topic/installing-error-4/#post-4188743)
 * Hi Sop,
 * This error is actually due to the unzipping process. Your host doesn’t have zlib
   installed and the backup PCL zip package is having trouble extracting the files.
 * I advice you to download the package manually, unzip the plugin and then unzip
   the mPDF.zip folder inside the plugin files. Once complete, FTP the plugin to
   your /wp-content/plugins/ folder. You should then be able initialise the plugin.
 * In response to Gravity Forms, yes. You will need Gravity Forms 1.7+ installed
   and activated to use this plugin.

Viewing 1 replies (of 1 total)

The topic ‘Installing error’ is closed to new replies.

 * ![](https://ps.w.org/gravity-forms-pdf-extended/assets/icon-256x256.png?rev=3168987)
 * [Gravity PDF](https://wordpress.org/plugins/gravity-forms-pdf-extended/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/gravity-forms-pdf-extended/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/gravity-forms-pdf-extended/)
 * [Active Topics](https://wordpress.org/support/plugin/gravity-forms-pdf-extended/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/gravity-forms-pdf-extended/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/gravity-forms-pdf-extended/reviews/)

 * 1 reply
 * 2 participants
 * Last reply from: [Jake Jackson](https://wordpress.org/support/users/blue-liquid-designs/)
 * Last activity: [12 years, 7 months ago](https://wordpress.org/support/topic/installing-error-4/#post-4188743)
 * Status: not resolved