Title: Weird Plugin Problem – “Call to undefined function:”
Last modified: August 18, 2016

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# Weird Plugin Problem – “Call to undefined function:”

 *  [robotdeathsquad](https://wordpress.org/support/users/robotdeathsquad/)
 * (@robotdeathsquad)
 * [19 years, 1 month ago](https://wordpress.org/support/topic/weird-plugin-problem-call-to-undefined-function/)
 * Hello All,
    I’m using a variant of the Hemingway theme. I have uploaded a plugin
   called “recent_comments” and in the Admin section, I can see it (as a “block”
   for the BottomBar), however, when I load up the front end of my blog, I get: `
   <b>Fatal error</b>: Call to undefined function: mdv_recent_comments() in <b>/
   home/sites/domain/public_html/wp-content/themes/themename/blocks/recent_comments.
   php</b> on line <b>4</b>`
 * This line is obvious:
    `<?php mdv_recent_comments(10, 7, '<li>', '</li>', false,
   1) ?>`
 * Any idea what could be causing this? I’m very confused because wp-admin is seeing
   the installed plugin. Very strange if you ask me. 😀
 * Thanks,
    RDS

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

 *  [yoru](https://wordpress.org/support/users/yoru/)
 * (@yoru)
 * [19 years, 1 month ago](https://wordpress.org/support/topic/weird-plugin-problem-call-to-undefined-function/#post-550144)
 * Seems like you haven’t **activated** the plugin yet…
 *  Thread Starter [robotdeathsquad](https://wordpress.org/support/users/robotdeathsquad/)
 * (@robotdeathsquad)
 * [19 years, 1 month ago](https://wordpress.org/support/topic/weird-plugin-problem-call-to-undefined-function/#post-550148)
 * How does one go about activating a plugin that wp-admin doesn’t say needs to 
   be installed?
 *  Moderator [Samuel Wood (Otto)](https://wordpress.org/support/users/otto42/)
 * (@otto42)
 * WordPress.org Admin
 * [19 years, 1 month ago](https://wordpress.org/support/topic/weird-plugin-problem-call-to-undefined-function/#post-550158)
 * Go to the plugins page in the admin. If you see the plugin there, then click 
   the Activate link next to it. If you don’t see the plugin there, then you have
   not uploaded it to the right place or something.

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

The topic ‘Weird Plugin Problem – “Call to undefined function:”’ is closed to new
replies.

 * 3 replies
 * 3 participants
 * Last reply from: [Samuel Wood (Otto)](https://wordpress.org/support/users/otto42/)
 * Last activity: [19 years, 1 month ago](https://wordpress.org/support/topic/weird-plugin-problem-call-to-undefined-function/#post-550158)
 * Status: not resolved

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