QuickFIX/n 不支持的消息类型

Question

I'm working on upgrading a VB.NET application from Quickfix.net 1.0.3 to the latest code on github (even newer than the published v1.9.0 because I need a new feature). After making the necessary changes, I'm receiving an Unsupported Message Type error from the cracker when I attempt to send in a FIX42.NewOrderSingle. I've looked through every similar issue on every forum and the issue is usually that it's not handling that particular message type, but I am handling the exact type, so I'm not sure what the problem is. I'm using the out of box specs too.

    Public Sub onMessage(ByVal message As FIX42.NewOrderSingle, ByVal session As QuickFix.SessionID)
        RaiseEvent Up2OMS_NewOrderSingle(message, session)
    End Sub

Any ideas or is there any way I can debug the issue?

Answer 1

Grant Birchmeier on the QuickFix/n mailing list had the solution: post on mailing list I needed to capitalize the initial "o" in OnMessage.

Normally case-sensitivity wouldn't matter in VB, but in this case, there's some internal C# code reflection that's literally looking for the exact string "OnMessage".