Title: Fatal error: getWithPrefixLen() Last modified: December 30, 2019 --- # Fatal error: getWithPrefixLen() * Resolved [whax](https://wordpress.org/support/users/whax/) * (@whax) * [6 years, 6 months ago](https://wordpress.org/support/topic/fatal-error-getwithprefixlen/) * After upgrading to 3.0 on two sites I get the following error on the front-end. * Fatal error: Uncaught Error: Call to undefined method MaxMind\Db\Reader::getWithPrefixLen() in /wp-content/plugins/geoip-detect/vendor/geoip2/geoip2/src/Database/Reader. php:246 * PHP 7.3 WP 5.3.2 * I can share the site address via direct msg. * Thank you! * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Ffatal-error-getwithprefixlen%2F%3Foutput_format%3Dmd&locale=en_US) to see the link]_ Viewing 15 replies - 1 through 15 (of 17 total) 1 [2](https://wordpress.org/support/topic/fatal-error-getwithprefixlen/page/2/?output_format=md) [→](https://wordpress.org/support/topic/fatal-error-getwithprefixlen/page/2/?output_format=md) * Thread Starter [whax](https://wordpress.org/support/users/whax/) * (@whax) * [6 years, 6 months ago](https://wordpress.org/support/topic/fatal-error-getwithprefixlen/#post-12281213) * Follow up: I disabled all plugins except geoip-detect and found the error only occurs when WooCommerce is also enabled. * [Benjamin Pick](https://wordpress.org/support/users/benjamin4/) * (@benjamin4) * [6 years, 6 months ago](https://wordpress.org/support/topic/fatal-error-getwithprefixlen/#post-12281676) * Thanks for your research. Probably WooCommerce also includes Maxmind code, but a different version … or maybe a WooCommerce extension? Can you search for files called “Reader.php” on your server? - This reply was modified 6 years, 6 months ago by [Benjamin Pick](https://wordpress.org/support/users/benjamin4/). * Thread Starter [whax](https://wordpress.org/support/users/whax/) * (@whax) * [6 years, 6 months ago](https://wordpress.org/support/topic/fatal-error-getwithprefixlen/#post-12282655) * Correct, WooCommerce core includes that file in the geolite2 library: [https://github.com/woocommerce/woocommerce/tree/master/includes/libraries/geolite2](https://github.com/woocommerce/woocommerce/tree/master/includes/libraries/geolite2) * [marnyscom](https://wordpress.org/support/users/marnyscom/) * (@marnyscom) * [6 years, 6 months ago](https://wordpress.org/support/topic/fatal-error-getwithprefixlen/#post-12285724) * Hi, I have the same issue. Did you solve it? * Thread Starter [whax](https://wordpress.org/support/users/whax/) * (@whax) * [6 years, 6 months ago](https://wordpress.org/support/topic/fatal-error-getwithprefixlen/#post-12287839) * I haven’t found a solution yet. I’m hoping [@benjamin4](https://wordpress.org/support/users/benjamin4/) can perform some magic. * [Benjamin Pick](https://wordpress.org/support/users/benjamin4/) * (@benjamin4) * [6 years, 6 months ago](https://wordpress.org/support/topic/fatal-error-getwithprefixlen/#post-12288920) * No I can’t 😉 I will be away until tuesday, can you inform the woocommerce developers? The simplest solution would be that they upgrade their library as well. * [Howdy_McGee](https://wordpress.org/support/users/howdy_mcgee/) * (@howdy_mcgee) * [6 years, 6 months ago](https://wordpress.org/support/topic/fatal-error-getwithprefixlen/#post-12290172) * Is there an alternative route that’s more future-proof? The current solution seems unreliable and may break again in the future if the same situation reappears. * Thread Starter [whax](https://wordpress.org/support/users/whax/) * (@whax) * [6 years, 6 months ago](https://wordpress.org/support/topic/fatal-error-getwithprefixlen/#post-12298323) * I agree with [@howdy_mcgee](https://wordpress.org/support/users/howdy_mcgee/), I understand library dependencies can be a problem with plugin dev but I’m hoping there’s some namespace(?) changes that could be made to isolate this plugin’s code? Thank you! * [Benjamin Pick](https://wordpress.org/support/users/benjamin4/) * (@benjamin4) * [6 years, 6 months ago](https://wordpress.org/support/topic/fatal-error-getwithprefixlen/#post-12299278) * I have filed a bug report: * [https://wordpress.org/support/topic/incompatible-with-plugin-geoip-detection-3-0-fatal-error/](https://wordpress.org/support/topic/incompatible-with-plugin-geoip-detection-3-0-fatal-error/) * [Ced](https://wordpress.org/support/users/cedriccharles/) * (@cedriccharles) * [6 years, 6 months ago](https://wordpress.org/support/topic/fatal-error-getwithprefixlen/#post-12303938) * Did you found something ? Or even a temporary fix ? My website is down because of this… I can’t deactivate WooCommerce nor GeoIP Detection… * Thank you ! * [Benjamin Pick](https://wordpress.org/support/users/benjamin4/) * (@benjamin4) * [6 years, 6 months ago](https://wordpress.org/support/topic/fatal-error-getwithprefixlen/#post-12304543) * I am reverting the Maxmind vendor library for now (3.0.1) until I have worked out a long-term solution with WooCommerce … * [Benjamin Pick](https://wordpress.org/support/users/benjamin4/) * (@benjamin4) * [6 years, 6 months ago](https://wordpress.org/support/topic/fatal-error-getwithprefixlen/#post-12304567) * 3.0.1 is released now, can you verify if it solves the problem for you? * [marnyscom](https://wordpress.org/support/users/marnyscom/) * (@marnyscom) * [6 years, 6 months ago](https://wordpress.org/support/topic/fatal-error-getwithprefixlen/#post-12304999) * I have tried it and it seems everything works fine. * Thank you. * Thread Starter [whax](https://wordpress.org/support/users/whax/) * (@whax) * [6 years, 6 months ago](https://wordpress.org/support/topic/fatal-error-getwithprefixlen/#post-12305709) * [@benjamin4](https://wordpress.org/support/users/benjamin4/) this is working great, thank you! I am concerned what might happen should WooCommerce’s implementation of the geolite2 library change. I’ll be following the Github issue you started. Thanks again for your attention to this issue. * Thread Starter [whax](https://wordpress.org/support/users/whax/) * (@whax) * [6 years, 6 months ago](https://wordpress.org/support/topic/fatal-error-getwithprefixlen/#post-12305712) * Resolved Viewing 15 replies - 1 through 15 (of 17 total) 1 [2](https://wordpress.org/support/topic/fatal-error-getwithprefixlen/page/2/?output_format=md) [→](https://wordpress.org/support/topic/fatal-error-getwithprefixlen/page/2/?output_format=md) The topic ‘Fatal error: getWithPrefixLen()’ is closed to new replies. * ![](https://ps.w.org/geoip-detect/assets/icon-256x256.jpg?rev=978998) * [Geolocation IP Detection](https://wordpress.org/plugins/geoip-detect/) * [Frequently Asked Questions](https://wordpress.org/plugins/geoip-detect/#faq) * [Support Threads](https://wordpress.org/support/plugin/geoip-detect/) * [Active Topics](https://wordpress.org/support/plugin/geoip-detect/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/geoip-detect/unresolved/) * [Reviews](https://wordpress.org/support/plugin/geoip-detect/reviews/) * 17 replies * 6 participants * Last reply from: [Diego](https://wordpress.org/support/users/daigo75/) * Last activity: [6 years, 6 months ago](https://wordpress.org/support/topic/fatal-error-getwithprefixlen/page/2/#post-12308728) * Status: resolved