General protection fault!

History: UObject::ProcessEvent <- UObject::GetPathName <- UObject::GetPathName <- UObject::GetFullName <- ATcpLink::Poll
Connections <- ATcpLink::Tick <- TickAllActors <- ULevel::Tick <- (NetMode=0) <- TickLevel <- UGameEngine::Tick <- Level
 HarbourRain <- UpdateWorld <- UServerCommandlet::Main

Exiting due to error