Title: [Plugin: WP-Optimize] Cannot Optimize DB Warning: mysql_num_rows(): (..) "on line 343"
Last modified: August 19, 2016

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# [Plugin: WP-Optimize] Cannot Optimize DB Warning: mysql_num_rows(): (..) "on line 343"

 *  Resolved [Dennis](https://wordpress.org/support/users/altermann/)
 * (@altermann)
 * [15 years, 6 months ago](https://wordpress.org/support/topic/plugin-wp-optimize-cannot-optimize-db-warning-mysql_num_rows-on-line-343/)
 * The “optimize database” it’s now working, it get that message.
 * Warning: mysql_num_rows(): supplied argument is not a valid MySQL result resource
   in (..)/wp-content/plugins/wp-optimize/wp-optimize-admin.php on line 343
 * Already saw another post on this forum, but it doesn’t work here.
 * Thx
 * [http://wordpress.org/extend/plugins/wp-optimize/](http://wordpress.org/extend/plugins/wp-optimize/)

Viewing 2 replies - 1 through 2 (of 2 total)

 *  [nowton](https://wordpress.org/support/users/nowton/)
 * (@nowton)
 * [15 years, 4 months ago](https://wordpress.org/support/topic/plugin-wp-optimize-cannot-optimize-db-warning-mysql_num_rows-on-line-343/#post-1813789)
 * Same here, proposed fix does not work.
 *  Thread Starter [Dennis](https://wordpress.org/support/users/altermann/)
 * (@altermann)
 * [15 years, 4 months ago](https://wordpress.org/support/topic/plugin-wp-optimize-cannot-optimize-db-warning-mysql_num_rows-on-line-343/#post-1813790)
 * After some tries, I fix it using the solutions:
 * [http://wordpress.org/support/topic/mysql_num_rows-error-in-wp-optimize-adminphp?replies=3](http://wordpress.org/support/topic/mysql_num_rows-error-in-wp-optimize-adminphp?replies=3)

Viewing 2 replies - 1 through 2 (of 2 total)

The topic ‘[Plugin: WP-Optimize] Cannot Optimize DB Warning: mysql_num_rows(): (..)"
on line 343"’ is closed to new replies.

 * ![](https://ps.w.org/wp-optimize/assets/icon-256x256.png?rev=1552899)
 * [WP-Optimize – Cache, Compress images, Minify & Clean database to boost page speed & performance](https://wordpress.org/plugins/wp-optimize/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/wp-optimize/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/wp-optimize/)
 * [Active Topics](https://wordpress.org/support/plugin/wp-optimize/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/wp-optimize/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/wp-optimize/reviews/)

 * 2 replies
 * 2 participants
 * Last reply from: [Dennis](https://wordpress.org/support/users/altermann/)
 * Last activity: [15 years, 4 months ago](https://wordpress.org/support/topic/plugin-wp-optimize-cannot-optimize-db-warning-mysql_num_rows-on-line-343/#post-1813790)
 * Status: resolved