ArcGIS License Problem “A change to the system binding has been detected”

I was checking to see why I could not connect to ArcGIS in the License Server Administrator when I received the error: “A change to the system binding has been detected”. I had to call ESRI technical support and I discovered that problem sometimes occurs when there is a change to the computers hardware or operating system. To resolve the problem new authorization codes had to be generated for the concurrent license(s) and extension(s) from ESRI’s head office. Here are the steps required to manually deauthorize the licenses and re-establish the correct port once the new authroization codes are available:

  1. In the License Server Administrator (LSA) stop the licenses
  2. Delete the files in the folder: C:\ProgramData\FlexNet
  3. When you receive the new authorization codes, authorize them in the LSA
  4. Before re-starting the License Server, re-establish the port settings if they are required to communicate through a fire wall:
    1. Open the file: C:\Program Files (x86)\ArcGIS\License10.X\bin\service.txt
    2. On the first line add the port to the end so it reads: SERVER this_host ANY 2700X (where X can be the port between 0 to 9, whatever corresponds to your firewall settings, see link below)
    3. On the second line add PORT=1234 to the end so it reads: VENDOR ARCGIS PORT=1234
    4. Save and exit
  5. In the LSA re-start the License Server
  6. Now ArcGIS should open. If not have a look at the following links or technical support

How can I get the ArcGIS 10 License Manager to work around the firewall on a Windows Server 2008 machine?

Configure the ArcGIS License Manager to work through a firewall


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