For company environments utilizing concurrent network licenses, the issue usually sits on the server side. System administrators should perform the following checks:

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Do you have access to the on your machine?

2. Immediate Troubleshooting Steps: "How Do I Fix This Right Now?"

The license had expired. Access denied.

This error is CATIA's way of telling you that its license to operate has been revoked or is no longer valid. At its core, this message appears because the software's internal clock (or its communication with a license server) has determined that the authorized usage period for the license has come to an end.

Open the on the server hosting the licenses. Connect to your local server instance.

In the DSLS Administration Tool, right-click your server and select . Browse to your new license file and select it.

If you use a standalone node-locked license, the file itself may have expired.

Whether you are using CATIA V5, CATIA 3DEXPERIENCE, or a specialized engineering seat, this scenario can cause panic, especially if you are working against a tight project deadline. Do not worry; this is a common administrative hurdle rather than a catastrophic system failure.

Whether you are running CATIA V5 or the newer 3DEXPERIENCE (CATIA V6) platform, this message indicates that your software license key has expired, or the license server is unable to validate your usage.

What happened

When this message appears, CATIA either switches to read-only mode or refuses to launch entirely. Resolving this issue efficiently requires understanding why it happens and following a structured troubleshooting approach. Understanding the Root Causes