RegisterEventSource returns NULL, error code is zero

Sometimes, when I call RegisterEventSource()

, it returns NULL. GetLastError()

returns 0.

The event log is on a remote computer in the same domain and the user is a domain administrator. It happens several times in a row on different machines (but with the log on the same machine) and then stops.

Why might this happen?

All computers are running Windows Server 2008. I am using C ++.