Sorry for the late response and the cryptic error message. Many common
classes derive from the struct that triggers an initialization of that
particular variable, so I'm a little surprised to see this. Is your code
actually instantiating a Channel at some point? This should have happened
before the BlockingUnaryCall wrapper was called.
On Tuesday, November 15, 2016 at 5:42:39 PM UTC-8, Paul Fleming wrote:
>
> Hello,
>
> I'm having the following runtime error "grpc::g_core_codegen_interface was
> nullptr." Using C++, protobufs 3.1, Windows64 VS2015
>
> Error occurs during the unary call wrapper, on the completequeue
> constructor. I am linking against grpc++/grpc++_{unsecure/reflection}
> correctly. (Can anyone define when to use reflection/unsecure? Unsecure
> seems to be for openssl-less linkage but still unclear on proper linkage
> requirements).
>
> Any clues where I may be going wrong? This is sadly using a more complex
> building system (UBT/UHT from Epics Unreal Engine) that may be complicating
> issues but some clues on debugging would be wonderful!
>
> Example Code:
> TCClient::LoginRequest loginRequest;
> TCClient::AuthResponse loginResponse;
> ClientContext context;
> loginRequest.set_email(TCHAR_TO_UTF8( *AccountCredentials.Id) );
> loginRequest.set_pass(TCHAR_TO_UTF8( *AccountCredentials.Token) );
>
>
> Status result = CommClient->LoginWithEmailAddress(&context, loginRequest,
> &loginResponse);
> if (result.ok()) {
> UE_LOG_ONLINE(Display, TEXT("Logged in user: %s"), *AccountCredentials.Id
> );
> return true;
>
> }
>
> Error:
> Exception thrown: read access violation.
> grpc::g_core_codegen_interface was nullptr.
>
> Status BlockingUnaryCall(ChannelInterface* channel, const RpcMethod&
> method,
> ClientContext* context, const InputMessage&
> request,
> OutputMessage* result) {
> -> CompletionQueue cq;
>
>
> Thank you for any assistance.
>
>
>
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