Pre-migration check outputs a warning: The component is not installed on the destination server

Sergey Senko

Updated January 13, 2026 19:13

Plesk for Windows Plesk for Linux kb: technical ext: migrator

Applicable to:

Plesk for Linux
Plesk for Windows

Symptoms

A pre-migration check shows the following warnings:

PLESK_WARN: The component mod_perl is not installed on the destination server. It will be unavailable for the following domains: 'example.com'
Install that component on the destination server or make sure that none of these domains actually need the component.

PLESK_WARN: The component mod_python is not installed on the destination server. It will be unavailable for the following domains: 'example.com'
Install that component on the destination server or make sure that none of these domains actually need the component.

PLESK_WARN: The component python is not installed on the destination server. It will be unavailable for the following domains: 'example.com'
Install that component on the destination server or make sure that none of these domains actually need the component.

PLESK_WARN: The component perl is not installed on the destination server. It will be unavailable for the following domains: 'example.com'
Install that component on the destination server or make sure that none of these domains actually need the component.

Cause

The mod_perl or/and mod_python are not installed on the destination server.

Resolution

Starting from Plesk 12.5 the mod_perl or/and mod_python are not included in Plesk.

More information is available here:

Why mod_perl, mod_python, mod_php Apache modules are not installed by default starting from Plesk 12.5?

You may safely ignore this message if none of your accounts uses Perl or/and Python, otherwise, install them manually.

Click here to see the additional information.

Plesk no longer licenses ActivePython and ActivePerl for Plesk for Windows. How to avoid violation of the license agreement (Windows)?