Title: array merge error and can’t modify header problem error
Last modified: August 19, 2016

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# array merge error and can’t modify header problem error

 *  [tyson121](https://wordpress.org/support/users/tyson121/)
 * (@tyson121)
 * [17 years, 1 month ago](https://wordpress.org/support/topic/array-merge-error-and-cant-modify-header-problem-error/)
 * Hey I just upgraded my wordpress to 2.7 and now I am getting load of errors. 
   such as three of these with different arguments
 * Warning: array_merge() [function.array-merge]: Argument #2 is not an array in/
   wp-includes/capabilities.php on line 537
 * and two of these on different lines
 * Warning: Cannot modify header information – headers already sent by (output started
   at /wp-includes/capabilities.php:537) in /wp-login.php on line 255
 * and about 10 of these on different lines
 * Warning: Cannot modify header information – headers already sent by (output started
   at /wp-includes/capabilities.php:537) in /wp-includes/pluggable.php on line 676
 * any help I am totally lost and stuck here, thanks

Viewing 1 replies (of 1 total)

 *  [esmi](https://wordpress.org/support/users/esmi/)
 * (@esmi)
 * [17 years, 1 month ago](https://wordpress.org/support/topic/array-merge-error-and-cant-modify-header-problem-error/#post-1044943)
 * [http://codex.wordpress.org/FAQ_Troubleshooting#How_do_I_solve_the_Headers_already_sent_warning_problem.3F](http://codex.wordpress.org/FAQ_Troubleshooting#How_do_I_solve_the_Headers_already_sent_warning_problem.3F)

Viewing 1 replies (of 1 total)

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## Tags

 * [header problem](https://wordpress.org/support/topic-tag/header-problem/)

 * In: [Fixing WordPress](https://wordpress.org/support/forum/how-to-and-troubleshooting/)
 * 1 reply
 * 2 participants
 * Last reply from: [esmi](https://wordpress.org/support/users/esmi/)
 * Last activity: [17 years, 1 month ago](https://wordpress.org/support/topic/array-merge-error-and-cant-modify-header-problem-error/#post-1044943)
 * Status: not resolved

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