...
On failure (one or more local HostIDs are invalid or the license server is down or otherwise unreachable), this function returns an error code in the format described in Return codes.
If you call this function on a feature that does not exist, it will return LMX_FEATURE_NOT_FOUND.
...
There is no need to call this function for network licenses if you are using automatic heartbeats. (Note that automatic heartbeats are for network licenses only.)
...