I don't know the original reason of 'BadNothingTodo'

[ggokka]

Write: Write a VQT, include VQ. Write.Response.ResponseHeader.ServiceResult is Bad: BadNothingToDo (0x800f0000)

[AlinMoldovean]

@ggokka ,

You need to check in the server where the error code is returned. Normally that is because the service request does not contain any operation.

[ggokka]

@AlinMoldovean One of the source is below

    public override ResponseHeader RegisterNodes(
        RequestHeader requestHeader, 
        NodeIdCollection nodesToRegister, 
        out NodeIdCollection registeredNodeIds)
    {
        registeredNodeIds = null;

        OperationContext context = ValidateRequest(requestHeader, RequestType.RegisterNodes);

        try
        {
            if (nodesToRegister == null || nodesToRegister.Count == 0)
            {
                throw new ServiceResultException(StatusCodes.BadNothingToDo);
            }

[AlinMoldovean]

In that case, the client sent a request with an empty list of nodesToRegister. And is normal for the server to reject it.