Article ID: 112384, created on Sep 26, 2011, last review on Jun 17, 2016

  • Applies to:
  • Plesk 12.5 for Linux
  • Plesk 11.5 for Windows


It is not possible to upload a large file using the Files Manager. The following error shows:

Unable to upload: data transmission error. Try again or contact the server administrator to resolve this problem.


The size of the file, which can be uploaded via File Manager, is limited by the PHP engine configuration.  This limit is set in the file ${PRODUCT_ROOT_D}/admin/conf/php.ini.


Edit file ${PRODUCT_ROOT_D}/admin/conf/php.ini and adjust the value of the configuration directives as follows:

    # egrep upload /usr/local/psa/admin/conf/php.ini
    upload_max_filesize = 2147483647

Restart sw-engine service:

    # /etc/init.d/sw-engine restart
    Restarting sw-engine (via systemctl):                      [  OK  ]

See also

Description of core php.ini directives

Search Words

PHP Warning: POST Content-Length of bytes exceeds the limit of bytes in Unknown on line 0

problem with file upload

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