Title: Warning : call_user_func_array()
Last modified: July 21, 2017

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# Warning : call_user_func_array()

 *  [ghrix](https://wordpress.org/support/users/ghrix/)
 * (@ghrix)
 * [8 years, 10 months ago](https://wordpress.org/support/topic/warning-call_user_func_array-9/)
 * Hello
 * I am working in wordpress multisite, In subsite I am getting this error :
 * **_Warning
    : call\_user\_func\_array() expects parameter 1 to be a valid callback,
   class ‘RevSliderFront’ does not have a method ‘putAdminBarMenus’ in /home/public\
   _html/example.com/wp-includes/class-wp-hook.php on line 298 Please help in resolving
   as i am using revolution slider as an Add on. Waiting for the reply.

Viewing 3 replies - 1 through 3 (of 3 total)

 *  [wbcomdesigns](https://wordpress.org/support/users/wbcomdesigns/)
 * (@wbcomdesigns)
 * [8 years, 10 months ago](https://wordpress.org/support/topic/warning-call_user_func_array-9/#post-9338988)
 * Hi, [@ghrix](https://wordpress.org/support/users/ghrix/)
 * Try deactivating all plugins. If that resolves the issue, reactivate each one
   individually until you find the cause.
 * If that does not resolve the issue, try switching to the Twenty Seventeen theme
   to rule-out a theme-specific issue (theme functions can interfere like plugins).
 * Thanks.
 *  Thread Starter [ghrix](https://wordpress.org/support/users/ghrix/)
 * (@ghrix)
 * [8 years, 10 months ago](https://wordpress.org/support/topic/warning-call_user_func_array-9/#post-9339021)
 * Hello [@wbcomdesigns](https://wordpress.org/support/users/wbcomdesigns/)
 * Thanks for the reply.
    I’ve tried plugins deactivation. Revolution Slider is 
   causing problem, but I am not getting th exact issue. I’ve even tried removing
   the functions from plugin core files.
 * Thanks & Regards
 *  [planethurf](https://wordpress.org/support/users/planethurf/)
 * (@planethurf)
 * [8 years, 10 months ago](https://wordpress.org/support/topic/warning-call_user_func_array-9/#post-9345853)
 * Same error on a single WP site. Disabling Revolution Slider stops error message
   displaying.

Viewing 3 replies - 1 through 3 (of 3 total)

The topic ‘Warning : call_user_func_array()’ is closed to new replies.

 * In: [Fixing WordPress](https://wordpress.org/support/forum/how-to-and-troubleshooting/)
 * 3 replies
 * 3 participants
 * Last reply from: [planethurf](https://wordpress.org/support/users/planethurf/)
 * Last activity: [8 years, 10 months ago](https://wordpress.org/support/topic/warning-call_user_func_array-9/#post-9345853)
 * Status: not resolved

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