When you encounter the error message "The Expiration Date Of Your License Has Arrived" in CATIA, it typically means your current license key has passed its validity date and the software can no longer authenticate your session.

At session start:

• Show a modal dialog:
  • A mock CATIA C++/C# implementation for the license check,
  • An admin script to audit expiration dates across a fleet,
  • Or a test plan for this feature.

  How to Fix It (Without Losing Your Mind)

  If you are staring at this screen right now, here is your action plan:

  What Does "The Expiration Date Of Your License Has Arrived" Actually Mean?

  In simple terms, CATIA licenses are not perpetual unless you have purchased a permanent license with a maintenance plan. Most modern CATIA deployments use timed licenses (e.g., monthly, annual, or educational licenses).