Error: FLEXlm Error: Cannot read data from license server (-16,287)
When attempting to start ArcGIS, the license manager returns the following error:
"FLEXlm Error: Cannot read data from license server
The license server process appears to be running, but is not responding.
If this persists, notify the System Administrator.
(The lmgrd and vendor daemon processes should be terminated and
FLEXlm error: -16,287"
The license manager cannot read data from the ESRI daemon within the timeout interval.
Solution or Workaround
Below is a list of possible solutions arranged by most to least common.
The instructions below include making changes to essential parts of your operating system. It is recommended that you backup your operating system and files, including the registry, before proceeding. Consult with a qualified computer systems professional, if necessary.
Esri cannot guarantee results from incorrect modifications while following these instructions; therefore, use caution and proceed at your own risk.
Check that the key TcpMaxConnectRetransmissions was created in the registry under HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters. Ensure that the value is 0. Also check that it was created in the folder 'Parameters' not 'Parameter'.
If TcpMaxConnectRetransmissions does not exist in 'Parameters', create it as a new DWORD value. The location will be HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters. Set the value to 0.