Error Log

Error.log is a log file that contains all types of messages (including notices that do not prevent running processes) coming from PHP while the plugin runs export or import.

It is located inside ‘/wordpress/wp-content/plugins/all-in-one-wp-migration/storage/’ directory. Errors and messages that the file contains are related to any problems that the plugin might face during the migration – wrongly set files/folders permissions on the server, conflicting plugins and/or themes, conflicts with PHP version installed on the server, etc.

If export or import runs smoothly, the error.log file will not be created inside the ‘storage’ directory and this can be an indication that All-in-One WP Migration did not face any errors. In case you encounter any issue when migrating your website, you can use the error.log information when trying to find the problem or at least to draw a conclusion if the problem is related to the migration plugin.





  1. Mike Lambert

    Doing a restore and getting this error after it finishes uploading and begins to do the import part. This is the second site I am working on, the first one imported no problem.

    Unable to authenticate your request with secret_key = “ims4xoyASN19”

  2. Michiel Nieuwstraten

    Hi, in that errorlog I found:

    {“Number”:8,”Message”:”Ai1wm_Database_Utility::replace_serialized_values(): The script tried to execute a method or access a property of an incomplete object. Please ensure that the class definition "WPML_Notice" of the object you are trying
    to operate on was loaded _before_ unserialize() gets called or provide an autoloader to load the class definition”,”File”:”\/var\/www\/\/workspace\/html\/wp-content\/plugins\/all-in-one-wp-migration\/lib\/vendor\/servmask\/database\/class-ai1w

    What does it mean?

    1. Lesley Arnold

      Hi Michiel
      Unless you are having a problem with migration or with WPML, I would ignore the error. If you are having issues, please reach out to our support team by email – support at servmask dot com.

  3. Kamal Kishore


    I am not able to export my website using All-in-one-wp-migration. It does work till the pop up which says download the file name with file size. I click on download now button and it starts downloading the file with no problem but it stops downloading the file after 9.61 MB when the file size shows on the pop up is 51 MB.

    Please help me on this ASAP, i will have to upload the file by tomorrow on my clients server.

    Thank you!

    Kamal Kishore

    1. Pim J. Iliev

      Hi Kamal,

      I am sorry for the inconvenience.
      You can download the .wpress backup file that the plugin has created using FTP (e.g. Filezilla) or cPanel from wp-content/ai1wm-backups.

  4. Christian De Rongé

    I got following error message when exporting my site : Out of disk space. Unable to write content to file. File: /home/coachingpu/www/wp-content/plugins/all-in-one-wp-migration/storage/v4o0odph5nbc/

    My site presently uses 5,61 Go out of 250 Go availaible

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