AutoCAD Electrical 2012 Network License issue

[BrianForeman7947]

Can someone help me trouble shoot my problem.  We have a single network license of AutoCAD Electrical 2012 that worked previously.  I set up several different PCs with the software and verified each was working several months ago.  Each system worked just fine.

Now, the entire department has completed basic AutoCAD Electrical training.  When we returned, I found the license is no longer working on any machine.  Every attempt to start AutoCAD Electrical results in the same error.  First, the system asks for the location of the license file or the license file server, then returns a message that "A valid license could not be obtained by the network license manager."  Error [-15.570.0]

The strange thing is the Vault software uses the same license file and it still works on ALL systems.  When I started this, I created a single license file for both packages and it worked fine for both products.  Now, when everyone wants to practice AutoCAD Electrical, the program won't start properly.

Any ideas how to start troubleshooting?

PS:  I did try stopping and restarting the license server, but it had no effect.

Thanks

[JTBWorld]

First step is to run LMTOOLS.exe and select the Server Status tab and click on Perform Status Enquiry. See if any errors shows up there.

[TravisNave]

Vault licenses are checked out by the ADMS server, not the client.  So clearly that server has access to the NLM.  Typically the -15 is usually caused by firewall blocking ports 2080 and 27000, or IPv6. 

Post the status results here to validate your Electrical licenses are working.  And also PING the server from your clients and make sure you are getting the correct IPv4 address.

You can also check for firewall port blocking by using Internet Explorer (only) via the following URLs:

http://servername:2080

http://servername:27000

Just replace servername with the hostname of your NLM server.  You should get a jargon response similar to this:

Wê-60Wê-60Wê-60Wê-60Wê-60Wê-60

If you get a 'Page cannot be Displayed' error, then you have no connectivity.

Let us know the results.