Hi,
I have installed the newest debugger version (VisualMicroDebugUpgrade_1301_14.msi) on MSVC 2010. My project is a simple example file that uses serial port. In Release mode it compiles, downloads and works well, but in Debug mode I am getting this error withing VM_DBG. (I took a screen shot, but don't know how to attach it to this post...)

Compiling 'current_only' for 'Arduino Mega (ATmega1280)'
Binary sketch size: 6744 bytes (of a 126976 byte maximum) (0.449 secs)
Compiling debug version of 'current_only' for 'Arduino Mega (ATmega1280)'
current_only.ino : In file included from
VM_DBG.h : ISO C++ forbids declaration of 'usb_serial_class' with no type
VM_DBG.h : expected ';' before '*' token
VM_DBG.h : 'usb_serial_class' has not been declared
VM_DBG.h : 'usb_serial_class' has not been declared
VM_DBG.cpp : In file included from
VM_DBG.h : ISO C++ forbids declaration of 'usb_serial_class' with no type
VM_DBG.h : expected ';' before '*' token
VM_DBG.h : 'usb_serial_class' has not been declared
VM_DBG.h : 'usb_serial_class' has not been declared
VM_DBG.cpp : variable or field 'begin' declared void
VM_DBG.cpp : 'usb_serial_class' was not declared in this scope
VM_DBG.cpp : 'theSerial' was not declared in this scope
Error compiling
 

Is this a known problem? How to get around it? Thanks!

Thank you - that version worked!