Title: Error calculation
Last modified: May 8, 2021

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# Error calculation

 *  Resolved [mailpop](https://wordpress.org/support/users/mailpop/)
 * (@mailpop)
 * [5 years ago](https://wordpress.org/support/topic/error-calculation/)
 * Hi,
 * I move my site today and after moving i have an error on claculation.
 * Now calculation is waiting and when i clic for forcing calculation i have the
   followin message :
 * > Error message:
   >  SyntaxError: Unexpected token < in JSON at position 0
 * Could you help me ?
 * Many thanks

Viewing 4 replies - 1 through 4 (of 4 total)

 *  Plugin Author [AntoineH](https://wordpress.org/support/users/antoineh/)
 * (@antoineh)
 * [5 years ago](https://wordpress.org/support/topic/error-calculation/#post-14415808)
 * If you enable [debugging in WordPress](https://wordpress.org/support/article/debugging-in-wordpress/),
   then you can see what the actual error is.
 * Another option is to view the response in your browser’s network tab. The problem
   is that the AJAX response is not a valid JSON string, but it contains the error
   message in HTML format, which is exactly what you want to know.
 *  Thread Starter [mailpop](https://wordpress.org/support/users/mailpop/)
 * (@mailpop)
 * [5 years ago](https://wordpress.org/support/topic/error-calculation/#post-14423408)
 * Hi,
 * Thank’s for your response, in network tab i can see that pool_wp_xxxx_scorehistory_s1_t1
   table does not exist.
 * But pool_wp_xxxx_scorehistory_s1_T2 exist.
 * Regards,
    Patrice.
 *  Plugin Author [AntoineH](https://wordpress.org/support/users/antoineh/)
 * (@antoineh)
 * [5 years ago](https://wordpress.org/support/topic/error-calculation/#post-14423421)
 * Okay. That is easy to fix. If you have access to phpmyadmin, then you can copy
   the table t2 to t1 (structure only, no data).
 * Another option that should also work: deactivate the plugin and activate it again.*
 * _* If you want to keep your data, then make sure you have the “keep data on uninstall”
   option enabled in the plugin options page._
 *  Thread Starter [mailpop](https://wordpress.org/support/users/mailpop/)
 * (@mailpop)
 * [5 years ago](https://wordpress.org/support/topic/error-calculation/#post-14423440)
 * After create the table it’s ok now 🙂
 * Many thank’s

Viewing 4 replies - 1 through 4 (of 4 total)

The topic ‘Error calculation’ is closed to new replies.

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 * 4 replies
 * 2 participants
 * Last reply from: [mailpop](https://wordpress.org/support/users/mailpop/)
 * Last activity: [5 years ago](https://wordpress.org/support/topic/error-calculation/#post-14423440)
 * Status: resolved