Title: WordPress 2.8 Plugin Update Problem Last modified: August 19, 2016 --- # WordPress 2.8 Plugin Update Problem * [arzlonga](https://wordpress.org/support/users/arzlonga/) * (@arzlonga) * [17 years ago](https://wordpress.org/support/topic/wordpress-28-plugin-update-problem/) * Hi there, * I’ve just updated my WordPress 2.7.1 to 2.8 via auto update. It finished updating without problems. * I also wanted to update one of my plugins which was adjusted to the new 2.8 version. But it gave me this error. * Warning: unpack() [function.unpack]: Type V: not enough input, need 4, have 0 in /home/***/public_html/***/wp-admin/includes/class-pclzip.php on line 4770 * PCLZIP_ERR_BAD_FORMAT (-10) : Invalid archive structure * So I tried 2 other plugins which have their new versions but getting the same errors. My auto plugin update was working very well before updating my WordPress version. So anyone knows anything about it? * PS: I can upload media, I can update WordPress but I can’t update my plugins. That’s my problem. Viewing 15 replies - 31 through 45 (of 46 total) [←](https://wordpress.org/support/topic/wordpress-28-plugin-update-problem/page/2/?output_format=md) [1](https://wordpress.org/support/topic/wordpress-28-plugin-update-problem/?output_format=md) [2](https://wordpress.org/support/topic/wordpress-28-plugin-update-problem/page/2/?output_format=md) 3 [4](https://wordpress.org/support/topic/wordpress-28-plugin-update-problem/page/4/?output_format=md) [→](https://wordpress.org/support/topic/wordpress-28-plugin-update-problem/page/4/?output_format=md) * [S.K](https://wordpress.org/support/users/kichu/) * (@kichu) * [16 years, 11 months ago](https://wordpress.org/support/topic/wordpress-28-plugin-update-problem/page/3/#post-1101872) * I upgraded all the LesterChan plugins automatically in WP 2.8 and it went on like a breeze! * S.K * [aldeiamix](https://wordpress.org/support/users/aldeiamix/) * (@aldeiamix) * [16 years, 11 months ago](https://wordpress.org/support/topic/wordpress-28-plugin-update-problem/page/3/#post-1101917) * Worked here too with new (http.php) file given by Ryan * Thank you! * [Ginchen](https://wordpress.org/support/users/ginchen/) * (@ginchen) * [16 years, 11 months ago](https://wordpress.org/support/topic/wordpress-28-plugin-update-problem/page/3/#post-1101925) * It’s still not working for me *crying* I have even tested with 2.8.1 beta now. * Auto-updates work fine on my local machine, but not on the live server. However, I have no idea which of the numerous server option and settings might be the reason. :/ * [pvkid](https://wordpress.org/support/users/pvkid/) * (@pvkid) * [16 years, 11 months ago](https://wordpress.org/support/topic/wordpress-28-plugin-update-problem/page/3/#post-1101939) * Up grading the [htpp.php](http://core.trac.wordpress.org/export/11450/trunk/wp-includes/http.php) fixed my problem with the “Invalid archive structure” problem. Thanks ryan pvkid [Puerto Vallarta Rentals](http://www.puerto-vallarta-rentals.com) * [Ginchen](https://wordpress.org/support/users/ginchen/) * (@ginchen) * [16 years, 11 months ago](https://wordpress.org/support/topic/wordpress-28-plugin-update-problem/page/3/#post-1101977) * I have solved the problem for me: * In `wp-config.php`, I had added the following line: `define('WP_TEMP_DIR', ABSPATH.' wp-content/upgrade');` because without that line, my auto-update wouldn’t work in WordPress 2.7. * Now in WordPress 2.8, it seems that the auto-update won’t work _with_ that line. 😉 So I removed it and everything’s working again! * [chris99460](https://wordpress.org/support/users/chris99460/) * (@chris99460) * [16 years, 10 months ago](https://wordpress.org/support/topic/wordpress-28-plugin-update-problem/page/3/#post-1102005) * Updating http.php fixed the problem. * Thanks, * [phwdennis](https://wordpress.org/support/users/phwdennis/) * (@phwdennis) * [16 years, 10 months ago](https://wordpress.org/support/topic/wordpress-28-plugin-update-problem/page/3/#post-1102008) * Updating the http.php didn’t help for me. (I wasn’t getting an error, but all the automatic updates would just stop after the message that it was downloading, or maybe that it was unpacking the update.) I deactivated all my plugins one- by-one, and it seems that the Gurken Subscribe to Comments plugin may have been causing the hang-up, because all the automatic updates worked after I deactivated it. Who knows, maybe it was just a fluke … * [billydec](https://wordpress.org/support/users/billydec/) * (@billydec) * [16 years, 9 months ago](https://wordpress.org/support/topic/wordpress-28-plugin-update-problem/page/3/#post-1102030) * Updating the http.php didn’t help for me either. Anybody know a fix for this? * [billydec](https://wordpress.org/support/users/billydec/) * (@billydec) * [16 years, 9 months ago](https://wordpress.org/support/topic/wordpress-28-plugin-update-problem/page/3/#post-1102034) * So is this a problem that has no solution? I’ve seen many posts in the forums about the auto update not working. I’d like to get wordpress working properly again. Someone please lend a helping hand. * [ruediger](https://wordpress.org/support/users/rh0/) * (@rh0) * [16 years, 8 months ago](https://wordpress.org/support/topic/wordpress-28-plugin-update-problem/page/3/#post-1102058) * After Updateing PHP to most current version 5.2.11 make me running into this problem as well. Using the offered http.php from this Thread didn’t solve this error either. So back to manually updateing PlugIns like we did in the past. * Self hostest WP 2.8.4 (en), Debian 4 and PHP 5.2.11 * [LaStrada](https://wordpress.org/support/users/lastrada/) * (@lastrada) * [16 years, 8 months ago](https://wordpress.org/support/topic/wordpress-28-plugin-update-problem/page/3/#post-1102067) * I have used Core Control for a while and I can update a plugin if I deactivates Core Control an reactivates it. Then I have to update all the plugins at once( open them in new tabs/windows) or deactivate and then reactivate the Core Control and then update one plugin at the time and then deactivate and reactivate again to update another plugin… * This works for me, not a good solution, but it works. * If I deactivate the Core Control I cannot update any plugins because wordpress don’t search for any updates and thinks that all the plugins are up to date. Thats why I have to activate the plugin after deactivating it… * [corrynews12](https://wordpress.org/support/users/corrynews12/) * (@corrynews12) * [16 years, 7 months ago](https://wordpress.org/support/topic/wordpress-28-plugin-update-problem/page/3/#post-1102075) * Silly question: Where do I find http.php? * [neobie](https://wordpress.org/support/users/neobie/) * (@neobie) * [16 years, 7 months ago](https://wordpress.org/support/topic/wordpress-28-plugin-update-problem/page/3/#post-1102085) * None of the solution working for me here.. please help. I am using wp 2.8.3 * [neobie](https://wordpress.org/support/users/neobie/) * (@neobie) * [16 years, 7 months ago](https://wordpress.org/support/topic/wordpress-28-plugin-update-problem/page/3/#post-1102086) * [@lastrada](https://wordpress.org/support/users/lastrada/) Thanks to you, I was able to upgrade my plugin by 1. activate core control 2. open new tab for plugin ugprade 3. deactive core control 4. ftp to start upgrade plugin and repeat step 1 for whatever plugins. * After upgrading the plugins, surprising I am able to upgrade from wp 2.8.3 to 2.8.5 Previously there is PCLZIP problem, and also another problem “cannot move the file” in theme folder problem. * Note that I have replaced my 2.8.3 wp-includes/http.php from wp2.8.5 that i downloaded before I do the above step. Not sure it helps or not. * [ruediger](https://wordpress.org/support/users/rh0/) * (@rh0) * [16 years, 6 months ago](https://wordpress.org/support/topic/wordpress-28-plugin-update-problem/page/3/#post-1102102) * Update: Problem is gone after Updateing/re-compiling most current PHP (Update) on my Server. I did not do anything than before. #strange Viewing 15 replies - 31 through 45 (of 46 total) [←](https://wordpress.org/support/topic/wordpress-28-plugin-update-problem/page/2/?output_format=md) [1](https://wordpress.org/support/topic/wordpress-28-plugin-update-problem/?output_format=md) [2](https://wordpress.org/support/topic/wordpress-28-plugin-update-problem/page/2/?output_format=md) 3 [4](https://wordpress.org/support/topic/wordpress-28-plugin-update-problem/page/4/?output_format=md) [→](https://wordpress.org/support/topic/wordpress-28-plugin-update-problem/page/4/?output_format=md) The topic ‘WordPress 2.8 Plugin Update Problem’ is closed to new replies. ## Tags * [problem](https://wordpress.org/support/topic-tag/problem/) * [trac10104](https://wordpress.org/support/topic-tag/trac10104/) * In: [Fixing WordPress](https://wordpress.org/support/forum/how-to-and-troubleshooting/) * 46 replies * 26 participants * Last reply from: [wrhector](https://wordpress.org/support/users/wrhector/) * Last activity: [16 years, 3 months ago](https://wordpress.org/support/topic/wordpress-28-plugin-update-problem/page/4/#post-1102139) * Status: not resolved ## Topics ### Topics with no replies ### Non-support topics ### Resolved topics ### Unresolved topics ### All topics