Siemens PLM Licensing NX: Can't checkout license; Server not connected, -10004?

When trying to run NX from a client machine, NX will return the message: 
Server not connected, -10004. 

Solution

This can be caused because the Windows firewall is blocking connection. Create two program rules that allow both:


c:\Program Files\Siemens\PlmLicenseServer\LMGRD.EXE 


and 
 
c:\Program Files\Siemens\PlmLicenseServer\UGSLMD.EXE 


through the firewall. Also create an inbound rule for TCP port 28000. This should allow the client machine to connect to the license server and resolve the error. 

Notes and References

Hardware/Software Configuration

Platform: INTL64
OS: window
OS Version: 764SP1
Product: NX
Application: SYSTEM
Version: V12.0
Function: SYSTEM_TOOLS

Ref: 001-9177254