Error: Invalid license key (inconsistent authentication code)

Issue

After you configured your FLEXlm® license server with licenses, users of the product were not able to pull a license. In the debug log file, the following errors were displayed:

<timestamp> (adskflex) Invalid license key (inconsistent authentication code)
<timestamp> (adskflex) ==>INCREMENT <ProductFeature> adskflex 1.000 <LicenseType> <LicenseCount> \


Solution

These error messages can indicate one of the following issues:

• The server hostname and MAC address (physical address) used to generate this license file are incorrect. You should verify that the server information listed in the license file matches the details on the System Settings tab in LMTOOLS. These errors can also occur if you combine multiple license files and the server hostname and MAC address are not consistent between all license increments.
• The version of FLEXlm® or FLEXnet being used is out of date. Check the Network Licensing Guide for your product to determine the correct FLEXlm version. Check the debug log file to make sure that both Lmgrd and Adskflex display the correct version.

Note: The server hostname and MAC address listed at the top of Autodesk license files are encrypted into each product increment and cannot be manually edited without invalidating the license file. If the server information is incorrect or you have manually modified the server details, you will need to submit a new request for a license file from Autodesk.