Hi,
I appreciate this is possibly a complex problem that may not have a solution but..
I'm running a real time os on my board, specifically NilRTOS. I have tried to set a debug breakpoint in my code but when it compiles I get the following error output:

Compiling debug version of 'HeatPumpController' for 'Arduino/Genuino Mega w/ ATmega2560 (Mega 2560)'
HeatPumpController.ino:In function 'void setup()
HeatPumpController.ino:44:74: error: no matching function for call to 'VisualMicroDebug::begin(NilSerialClass*, long int)
:void setup(void) { 
    debugger: The error shown above might be caused by invalid breakpoint syntax?
HeatPumpController.ino:candidates are
HeatPumpController.ino:In file included from
VM_DBG.h:begin(HardwareSerial*)
:void begin(HardwareSerial *theSerial)
VM_DBG.h:candidate expects 1 argument, 2 provided
VM_DBG.h:begin(HardwareSerial*, long unsigned int)
:void begin(HardwareSerial *theSerial, unsigned long baud)
VM_DBG.h:no known conversion for argument 1 from 'NilSerialClass*' to 'HardwareSerial*
Error compiling project sources

Is this possible to fix?

Hi,
I downloaded it from here:
https://github.com/greiman/NilRTOS-Arduino

Hi,

There has been work due to the release of arduino 1.6.6 so anything new has been delayed.

Hopefully it will be looked at during the next week or so maybe earlier.

Thanks