How do we trouble shoot a long-running NETMF program that stops in production?

Question

Situtation

I have a FEZ Cobra II NET running test code. It sends data every second to a server on the LAN. The server writes the data to a text file. After 27 hours and 97,200 successful sends, the Cobra stops sending. Clearly I am not going to debug for 27 hours, and I am not sure how else to trouble shoot, because standard software trouble shooting approaches do not apply.

Question

• If I were to write to log errors on the Cobra, how would I access them?
• Does NETMF have application logs? How can we access them?
• Is there an event viewer?
• What other trouble shooting / debugging steps are viable here?

Code

public class Program
{
    private static Timer timer;
    private Network network;

    public static void Main()
    {
        Program p = new Program();
        p.network = new Network();
        p.RepeatedlySendDataToWcfService();
        Thread.Sleep(Timeout.Infinite);
    }

    private void RepeatedlySendDataToWcfService()
    {
        Program.timer = 
            new Timer(this.TimerCallback_SendSbcData, new object(), 0, 1000);            
    }

    private void TimerCallback_SendSbcData(object stateInfo)
    {
        SbcData data = new SbcData();
        this.network.Send(data);
    }
}

Search and Research

• https://stackoverflow.com/search?q=netmf+troubleshooting No results.
• https://stackoverflow.com/search?q=netmf+error+log No results.
• https://stackoverflow.com/search?q=netmf+remoting No results.
• Can we access Cobra II error logs?
• NETMF - Debugging Applications

Answer 1

As the Fez has a memory card slot, you could log send errors to that:

private void TimerCallback_SendSbcData(object stateInfo)
{
    try
    {
        SbcData data = new SbcData();
        this.network.Send(data);
    }
    catch (Exception ex)
    {
        MyLogToCardMethod(ex.ToString());
    }
}

Mounting the card instructions are on the manufacturer site:

https://www.ghielectronics.com/docs/51/netmf-file-system