Title: error – Warning call_user_func_array() Last modified: August 21, 2016 --- # error – Warning call_user_func_array() * Resolved [tradeoffice](https://wordpress.org/support/users/tradeoffice/) * (@tradeoffice) * [12 years, 2 months ago](https://wordpress.org/support/topic/error-warning-call_user_func_array-1/) * this is the error message i get all over my site when the plugin is installed * Warning: call_user_func_array() expects parameter 1 to be a valid callback, function‘ process_post’ not found or invalid function name in /home/treasure/public_html/ xxxxxx.com/wp/wp-includes/plugin.php on line 429 * what to do? thx * [https://wordpress.org/plugins/great-index/](https://wordpress.org/plugins/great-index/) Viewing 11 replies - 1 through 11 (of 11 total) * Plugin Author [roycegracie](https://wordpress.org/support/users/roycegracie/) * (@roycegracie) * [12 years, 1 month ago](https://wordpress.org/support/topic/error-warning-call_user_func_array-1/#post-4757064) * what version is your wordpress ? * [Elzbru](https://wordpress.org/support/users/kalliopeb/) * (@kalliopeb) * [12 years ago](https://wordpress.org/support/topic/error-warning-call_user_func_array-1/#post-4757086) * Hi, * The above error appears on wordpress version 3.9.1 is there a solution for this? * Thank you * Plugin Author [roycegracie](https://wordpress.org/support/users/roycegracie/) * (@roycegracie) * [12 years ago](https://wordpress.org/support/topic/error-warning-call_user_func_array-1/#post-4757087) * i can’t seem to see that error, installed a fresh 3.9.1 wordpress and installed the plug and it’s all good… * try disabling all other plugins * Thread Starter [tradeoffice](https://wordpress.org/support/users/tradeoffice/) * (@tradeoffice) * [12 years ago](https://wordpress.org/support/topic/error-warning-call_user_func_array-1/#post-4757088) * Hi Zeevm my wordpress version is 3.8.3 and i get the following error as previously mentioned * Warning: call_user_func_array() expects parameter 1 to be a valid callback, function‘ process_post’ not found or invalid function name in /home/treasure/public_html/ xxxxxx.com/wp/wp-includes/plugin.php on line 429 * thanks * [Elzbru](https://wordpress.org/support/users/kalliopeb/) * (@kalliopeb) * [12 years ago](https://wordpress.org/support/topic/error-warning-call_user_func_array-1/#post-4757094) * Hi there – I have done as suggested above, but the same error keeps appearing: * Warning: call_user_func_array() expects parameter 1 to be a valid callback, function‘ process_post’ not found or invalid function name in /home/powerm/public_html/ wp-includes/plugin.php on line 470 * Plugin Author [roycegracie](https://wordpress.org/support/users/roycegracie/) * (@roycegracie) * [12 years ago](https://wordpress.org/support/topic/error-warning-call_user_func_array-1/#post-4757095) * when you turn off all other plugins and switch to the default theme, dose it still show this error ? * [Elzbru](https://wordpress.org/support/users/kalliopeb/) * (@kalliopeb) * [12 years ago](https://wordpress.org/support/topic/error-warning-call_user_func_array-1/#post-4757096) * Yes. * Actually when trying to change to default theme the following errors come up: * Warning: call_user_func_array() expects parameter 1 to be a valid callback, function‘ process_post’ not found or invalid function name in /home/powerm/public_html/ wp-includes/plugin.php on line 470 * Warning: Cannot modify header information – headers already sent by (output started at /home/powerm/public_html/wp-includes/plugin.php:470) in /home/powerm/public_html/ wp-includes/pluggable.php on line 1121 * Plugin Author [roycegracie](https://wordpress.org/support/users/roycegracie/) * (@roycegracie) * [11 years, 11 months ago](https://wordpress.org/support/topic/error-warning-call_user_func_array-1/#post-4757099) * it seems as if the problem is caused because of the line: `add_action('init',' process_post');` * this line is in charge of the internal details associated with every post. i will try to fix this soon * Plugin Author [roycegracie](https://wordpress.org/support/users/roycegracie/) * (@roycegracie) * [11 years, 11 months ago](https://wordpress.org/support/topic/error-warning-call_user_func_array-1/#post-4757100) * ok i believe i fixed it. please update the plugin * [Elzbru](https://wordpress.org/support/users/kalliopeb/) * (@kalliopeb) * [11 years, 11 months ago](https://wordpress.org/support/topic/error-warning-call_user_func_array-1/#post-4757101) * Hi there -it does not throw up the above errors anymore, however now you cannot see any of the listings. * The categories create nicely and the listing is created but when you click on it it tells you: “Not Found Apologies, but the page you requested could not be found. Perhaps searching will help.” * I have tried changing to default theme, as I thought it might be theme related but it does the same in the default themes. * Any suggestions? * Plugin Author [roycegracie](https://wordpress.org/support/users/roycegracie/) * (@roycegracie) * [11 years, 11 months ago](https://wordpress.org/support/topic/error-warning-call_user_func_array-1/#post-4757102) * please see the FAQ: [http://wordpress.org/plugins/great-index/faq/](http://wordpress.org/plugins/great-index/faq/) * “can i see the internal post, i get an 404 page” Viewing 11 replies - 1 through 11 (of 11 total) The topic ‘error – Warning call_user_func_array()’ is closed to new replies. * ![](https://s.w.org/plugins/geopattern-icon/great-index.svg) * [Great Index](https://wordpress.org/plugins/great-index/) * [Frequently Asked Questions](https://wordpress.org/plugins/great-index/#faq) * [Support Threads](https://wordpress.org/support/plugin/great-index/) * [Active Topics](https://wordpress.org/support/plugin/great-index/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/great-index/unresolved/) * [Reviews](https://wordpress.org/support/plugin/great-index/reviews/) * 11 replies * 3 participants * Last reply from: [roycegracie](https://wordpress.org/support/users/roycegracie/) * Last activity: [11 years, 11 months ago](https://wordpress.org/support/topic/error-warning-call_user_func_array-1/#post-4757102) * Status: resolved