Even if the error pops up, the License Manager window often remains open. View Status: Look at the list of available licenses. Green: More than 30 days until expiration. Orange: Less than 30 days remaining. Red: Already expired.
Licenses are often "node-locked" to a specific machine's unique ID. If you have recently upgraded your PC or are using a docking station (like a Thunderbolt dock), your Target ID may have shifted. The Expiration Date Of Your License Has Arrived Catia
Use the Managed DSLS Eligibility tool from Dassault Systèmes to check if your workstation can reach the license service. Even if the error pops up, the License
Your computer cannot "talk" to the Dassault Systèmes License Server (DSLS) due to network issues or firewall blocks. Step 1: Check Your License Status Orange: Less than 30 days remaining
Before assuming you need to buy a new license, verify what CATIA sees:
A hardware change (like a new network card or motherboard) has changed your "Computer ID" or "Target ID," making the old license file invalid.