Problem Outline:
This problem is characterized by an error message that appears right after PTC Creo 2.0 launches. The error appears in a Creo window named "Warning: Message List" and typically has a large amount of text below the "License request failed for feature" which appears at the top. A screenshot of the message is shown below.
Solution:
This error appears when Creo is unable to effectively validate your license file. Often this happens when a license file expires, becomes corrorupt, is generated incorrectly or is deleted. Alternatively since your Creo license is tied to the Host ID of the first priority network card on your computer your computer may be using the wrong Host ID. Often, computers have more than one network card (wireless and LAN) and if one of the cards is enabled or disabled after licensing, the first priority network card and thus Host ID will change. If this happens, Creo will open with a message that says “License request failed for feature” and if you expand the Warning Message List dialog box, you will see “Invalid host”.
If you see "Invalid Host" in the Warning Message List dialog box then try this guide...
If you do not see "Invalid Host" or the above guide was unsuccessful, then use this guide to send Academic Support your license file....