An unexpected error "No such feature exists". FLEXnet licensing error -5,21

• License type: Network 
• Occurrence: On EMTP Opening. 
When trying to open EMTP, it does not open and instead the following message pops up:

• Solutions: 
- Make sure the EMTP version matches or is older than the network license. >>See how 
- Make sure the server hostname in the license file is correct. >>See how 
- Make sure the client license file matches the network license file. >>See how 
- Make sure the Client computer can access to the server hosting the EMTP-RV FlexLM license manager. >>See how 
- Replace the name of the server in license file by its IP address.

- Send log file and server status to support@emtp.com