Title: Error "function not found"
Last modified: August 21, 2016

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# Error "function not found"

 *  [Mark Max Henckel](https://wordpress.org/support/users/sommerinhamburg/)
 * (@sommerinhamburg)
 * [13 years ago](https://wordpress.org/support/topic/error-function-not-found/)
 * I have a not very easy installation on an Internationalized domain name (“ä” 
   German). With the settings under _dm\_admin\_page_ I get the following error 
   message:
 * **Warning:** call_user_func_array () Expects parameter 1 to be a valid callback,
   function ‘dm_admin_page’ not found or invalid function name in _/www/htdocs/xxx/
   wp-includes/plugin.php_ on line 406
 * What could that mean? Tried a lot, nothing helped.
 * Thanks for support.
 * [http://wordpress.org/extend/plugins/wordpress-mu-domain-mapping/](http://wordpress.org/extend/plugins/wordpress-mu-domain-mapping/)

Viewing 1 replies (of 1 total)

 *  Plugin Author [Ron Rennick](https://wordpress.org/support/users/wpmuguru/)
 * (@wpmuguru)
 * [13 years ago](https://wordpress.org/support/topic/error-function-not-found/#post-3815856)
 * DM only supports puny format domain names.

Viewing 1 replies (of 1 total)

The topic ‘Error "function not found"’ is closed to new replies.

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## Tags

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

 * 1 reply
 * 2 participants
 * Last reply from: [Ron Rennick](https://wordpress.org/support/users/wpmuguru/)
 * Last activity: [13 years ago](https://wordpress.org/support/topic/error-function-not-found/#post-3815856)
 * Status: not resolved