Can you make a new project with a very simple code, like this:
using GT = Gadgeteer;
using GTM = Gadgeteer.Modules;
public partial class Program
Beside, take a look on your MultiLED module, it has “XY*” and “" socket, make sure that the socket "XY” is connected to mainboard.
And also, usually when an exception is thrown, the program will stop at a breakpoint , what the breakpoint did you see?
Double click on “Program.generated.cs”, go to
private void InitializeModules()
// Initialize GTM.Modules and event handlers here.
led = new GTM.GHIElectronics.MulticolorLed(8);
You will be received Null exception if don't have "led =new GTM.GHIElectronics.MulticolorLed(x)"