Click to restart Altium Designer and finalize the installation process. Troubleshooting Common Errors Error: "Repository Not Found"

However, Altium Designer relies heavily on an active internet connection to download and install extensions, updates, and core tools. If your workstation is completely offline, standard installation methods will fail.

: Altium is still trying to validate the extension online.

Altium Designer is a popular electronic design automation (EDA) software used for designing and manufacturing printed circuit boards (PCBs). The software offers a range of extensions that enhance its functionality and provide additional features. However, in some cases, users may need to install these extensions offline, without an active internet connection. This report provides a step-by-step guide on how to install Altium extensions offline.

Altium uses a "Local Installation Service" to mimic the cloud repository. You need to point your software to your local files instead of Altium’s servers.

: Download the ZIP file on an internet-connected machine and transfer it to the target offline computer via a USB drive. Step 2: Configure Altium for Offline Installation

Installing Altium Designer extensions in an offline environment—such as on a secure machine or one behind a strict firewall—requires the use of an . This package is a standalone ZIP archive that contains the core software and all necessary extension files, allowing you to bypass the standard cloud-based installation. Step 1: Obtain the Offline Installer

A prompt will appear at the top of the page. Click .

With the local source configured, installing the extensions mirrors the standard online workflow. Navigate back to the page.

💡 Altium caches the paths to these offline folders in its own settings. If you ever move the offline folder to a new location, you must repeat steps 4-6 to update this path; otherwise, you'll encounter a "Cannot find package in directory" error.

Once you have the necessary extension files, you need to configure Altium Designer to recognize them. Step 1: Open Preferences

Utilizing pre-packaged installation files or an Altium Infrastructure Server (AIS) within your local area network. Prerequisites for Offline Installation Before starting, ensure you have the following resources: