SO today practice ANSYS 16.2 crack file.it is kinda headache,
but at the end of days, I realize that actually you do not need to edit the license file. you can just connect it. then it will work itself.
https://johnkaisercalautit.wordpress.com/2013/02/14/how-to-fix-ansys-workbench-flexlm-error/

Step-by-step guide:

1. Run Server ANSLIC_ADMIN utility (as administrator)

2. Click Stop the ANSYS, Inc. License Manager

3. Open command prompt and enter netstat -a. Scroll down and you should find port 1055 in use.

4. From the ADMIN Utility, click Specify the License Server Machine

5. Click Edit Selected Server Machine

6. Change ANSYS FLEXlm port number to any port number other than 1055 (ex. 1056) and click OK

7. Go to the folder \Program Files\ANSYS Inc\Shared Files\Licensing and open license.dat using notepad. Change the port no. to the one you set above and save.

8. From the Server ANSLIC_ADMIN utility, click Install the License File

9. Browse for the edited license.dat file

10. Click Start the ANSYS, Inc. License Manager

ansys fixed

what the hell.
today morning wake up fixed the flexnet problem for ansys.
https://johnkaisercalautit.wordpress.com/2013/02/14/how-to-fix-ansys-workbench-flexlm-error/
Step-by-step guide:

1. Run Server ANSLIC_ADMIN utility (as administrator)

2. Click Stop the ANSYS, Inc. License Manager

3. Open command prompt and enter netstat -a. Scroll down and you should find port 1055 in use.

4. From the ADMIN Utility, click Specify the License Server Machine

5. Click Edit Selected Server Machine

6. Change ANSYS FLEXlm port number to any port number other than 1055 (ex. 1056) and click OK

7. Go to the folder \Program Files\ANSYS Inc\Shared Files\Licensing and open license.dat using notepad. Change the port no. to the one you set above and save.

8. From the Server ANSLIC_ADMIN utility, click Install the License File

9. Browse for the edited license.dat file

10. Click Start the ANSYS, Inc. License Manager