Title: Unknown error when uploading files
Last modified: August 24, 2016

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# Unknown error when uploading files

 *  [Lisa Cerezo](https://wordpress.org/support/users/lisathirdsideco/)
 * (@lisathirdsideco)
 * [11 years ago](https://wordpress.org/support/topic/unknown-error-when-uploading-files/)
 * My client is reporting random instances of customers not being able to upload
   files. They are using files whose format is allowed on our end, and whose size
   is well within the size restrictions we set, but some upload while others do 
   not. We placed a file upload shortcode within a form generated by Contact Form
   7. Files that do not upload properly show a red box which reads “File not uploaded”
   and underneath “Upload failed! Unknown error.”
 * The site is using the most updated versions of both WordPress and the plugin (
   just updated it today). Would love to know how to overcome this upload error.
 * Thanks in advance.
 * [https://wordpress.org/plugins/wp-file-upload/](https://wordpress.org/plugins/wp-file-upload/)

Viewing 5 replies - 1 through 5 (of 5 total)

 *  Plugin Author [nickboss](https://wordpress.org/support/users/nickboss/)
 * (@nickboss)
 * [11 years ago](https://wordpress.org/support/topic/unknown-error-when-uploading-files/#post-6146580)
 * What is the size of the files in general?
 *  Thread Starter [Lisa Cerezo](https://wordpress.org/support/users/lisathirdsideco/)
 * (@lisathirdsideco)
 * [11 years ago](https://wordpress.org/support/topic/unknown-error-when-uploading-files/#post-6146582)
 * We have a limit of 100mb, and we had a 22mb file go through with no problem. 
   Had upload errors for a 38mb file and an 88mb file.
 *  Plugin Author [nickboss](https://wordpress.org/support/users/nickboss/)
 * (@nickboss)
 * [11 years ago](https://wordpress.org/support/topic/unknown-error-when-uploading-files/#post-6146667)
 * are you using the free version of the plugin?
 *  Thread Starter [Lisa Cerezo](https://wordpress.org/support/users/lisathirdsideco/)
 * (@lisathirdsideco)
 * [11 years ago](https://wordpress.org/support/topic/unknown-error-when-uploading-files/#post-6146683)
 * Yes. Does the Pro version address this?
 *  Plugin Author [nickboss](https://wordpress.org/support/users/nickboss/)
 * (@nickboss)
 * [11 years ago](https://wordpress.org/support/topic/unknown-error-when-uploading-files/#post-6146726)
 * Usually the web servers impose limits to the file size and the time that it takes
   for the files to upload. Please check the following php variables for their values:
 * upload_max_filesize
    post_max_size memory_limit max_execution_time max_input_time
 * You can try to change these values, but sometimes the host provider does not 
   allow it.
 * The Pro version of the plugin uses another way to upload files that overcomes
   these restrictions and can upload files of any size.
 * Nickolas

Viewing 5 replies - 1 through 5 (of 5 total)

The topic ‘Unknown error when uploading files’ is closed to new replies.

 * ![](https://ps.w.org/wp-file-upload/assets/icon-256x256.png?rev=3252590)
 * [Iptanus File Upload](https://wordpress.org/plugins/wp-file-upload/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/wp-file-upload/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/wp-file-upload/)
 * [Active Topics](https://wordpress.org/support/plugin/wp-file-upload/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/wp-file-upload/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/wp-file-upload/reviews/)

 * 5 replies
 * 2 participants
 * Last reply from: [nickboss](https://wordpress.org/support/users/nickboss/)
 * Last activity: [11 years ago](https://wordpress.org/support/topic/unknown-error-when-uploading-files/#post-6146726)
 * Status: not resolved