Title: Cannot modify header information warning Last modified: August 22, 2016 --- # Cannot modify header information warning * [Bloogooroo](https://wordpress.org/support/users/bloogooroo/) * (@bloogooroo) * [11 years, 10 months ago](https://wordpress.org/support/topic/cannot-modify-header-information-warning-3/) * I read that I simply have to remove white space at the offending line when I get this message: Warning: Cannot modify header information – headers already sent by (output started at /home/content/67/5962867/html/wp-content/themes/lupercalia/ functions.php:892) in /home/content/67/5962867/html/wp-includes/pluggable.php on line 1121 * I couldn’t figure it out and it wouldn’t let me upload pictures, access my media libary, or even log in, so I changed back to my old theme and then back to this one. I still can’t load media and now have about twenty of those error messages, although I can at least log in and out of my admin page. Viewing 6 replies - 1 through 6 (of 6 total) * Theme Author [José Leonardo](https://wordpress.org/support/users/joseleonardo/) * (@joseleonardo) * [11 years, 9 months ago](https://wordpress.org/support/topic/cannot-modify-header-information-warning-3/#post-5201193) * Hey there, * you are the second person talking about this error. It was not happening before, so I think it is related with the newer WordPress version. * Can you confirm if you updated your WordPress recently? * Theme Author [José Leonardo](https://wordpress.org/support/users/joseleonardo/) * (@joseleonardo) * [11 years, 9 months ago](https://wordpress.org/support/topic/cannot-modify-header-information-warning-3/#post-5201194) * This girl seems to have solved the problem. * [http://wordpress.org/support/topic/receiving-header-error-help?replies=4#post-5919752](http://wordpress.org/support/topic/receiving-header-error-help?replies=4#post-5919752) * It is not related with the theme, I think it is related to the newer WordPress as I mentioned before. * Thread Starter [Bloogooroo](https://wordpress.org/support/users/bloogooroo/) * (@bloogooroo) * [11 years, 9 months ago](https://wordpress.org/support/topic/cannot-modify-header-information-warning-3/#post-5201227) * Thanks, that solution worked, but I still get errors cropping pictures for the header, and the slider native to the theme won’t show up (my site is blog.thegreciangarden. com). I tried making a new home and blog page, but that didn’t seem to make a difference as I still don’t see a slider. Changing the settings in theme options and going with a static page didn’t seem to matter either. I could just have a bug as recent post sliders on my old theme would never work. * Theme Author [José Leonardo](https://wordpress.org/support/users/joseleonardo/) * (@joseleonardo) * [11 years, 9 months ago](https://wordpress.org/support/topic/cannot-modify-header-information-warning-3/#post-5201229) * Bloogooroo, * can you be more specific about the error? Could please post the message you are receiving when you try to upload a new header? * Thank you! * Thread Starter [Bloogooroo](https://wordpress.org/support/users/bloogooroo/) * (@bloogooroo) * [11 years, 9 months ago](https://wordpress.org/support/topic/cannot-modify-header-information-warning-3/#post-5201230) * Warning: imagecreatetruecolor() [function.imagecreatetruecolor]: Invalid image dimensions in /home/content/67/5962867/html/wp-includes/media.php on line 1987 * Warning: imageantialias(): supplied argument is not a valid Image resource in/ home/content/67/5962867/html/wp-includes/class-wp-image-editor-gd.php on line 282 * Warning: imagecopyresampled(): supplied argument is not a valid Image resource in /home/content/67/5962867/html/wp-includes/class-wp-image-editor-gd.php on line 284 Image could not be processed. Please go back and try again. * It will work if I skip cropping. I don’t want a header though, just a slider. The problem might be that I got rid of the home page, but now I put one back on and it still doesn’t work. * Theme Author [José Leonardo](https://wordpress.org/support/users/joseleonardo/) * (@joseleonardo) * [11 years, 9 months ago](https://wordpress.org/support/topic/cannot-modify-header-information-warning-3/#post-5201231) * I found it * [http://wordpress.org/support/topic/upload-image-error-when-using-work-a-holic-theme?replies=12](http://wordpress.org/support/topic/upload-image-error-when-using-work-a-holic-theme?replies=12) * It is wark to know if it is related with the theme, it was working fine before. I am still looking for a anwser. Viewing 6 replies - 1 through 6 (of 6 total) The topic ‘Cannot modify header information warning’ is closed to new replies. * ![](https://i0.wp.com/themes.svn.wordpress.org/lupercalia/1.5/screenshot.png) * Lupercalia * [Support Threads](https://wordpress.org/support/theme/lupercalia/) * [Active Topics](https://wordpress.org/support/theme/lupercalia/active/) * [Unresolved Topics](https://wordpress.org/support/theme/lupercalia/unresolved/) * [Reviews](https://wordpress.org/support/theme/lupercalia/reviews/) ## Tags * [modify header](https://wordpress.org/support/topic-tag/modify-header/) * 6 replies * 2 participants * Last reply from: [José Leonardo](https://wordpress.org/support/users/joseleonardo/) * Last activity: [11 years, 9 months ago](https://wordpress.org/support/topic/cannot-modify-header-information-warning-3/#post-5201231) * Status: not resolved