Hi,

I have split your post into its own thread because that's the easiest way to ask questions and communicate. 

Did you also upgrade the arduino ide? 

For compile errors please switch on vmicro>compiler>verbose and "show build properties". then build. Copy the output into a new .txt file and emaill to info[at]visualmicro.com with a link to this post or post it here.

Thanks

Here is the verbose compiler messages. Again, this is a project with nothing added to it from the template.

Compiling 'Sketch7' for 'Arduino Nano w/ ATmega328'
Build Folder: file:///C:/Users/Mike/AppData/Local/Temp/VMBuilds/Sketch7/nano_atmega328/Debug
Summary: Header=1 Prototypes=3 Imports=0
Additional Defines: 
Architecture Tools: file:///c:/Program%20Files%20(x86)/Arduino/hardware/tools/avr/bin/
Sketch Book: file:///C:/Users/Mike/Documents/Arduino
Sketch Include Paths
Core Include Paths
Include Path 6.13/cores/arduino
Include Path 6.13/variants/eightanaloginputs
Searching for libraries ...
"c:\Program Files (x86)\Arduino\hardware\tools\avr\bin\avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10605 -DARDUINO_AVR_NANO -DARDUINO_ARCH_AVR cores\arduino" variants\eightanaloginputs" cpp" -o "nul"
 
Building variant ...
 
Building core ...
"c:\Program Files (x86)\Arduino\hardware\tools\avr/bin/avr-gcc" -c -g -x assembler-with-cpp -flto -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10605 -DARDUINO_AVR_NANO -DARDUINO_ARCH_AVR cores\arduino" variants\eightanaloginputs" res\arduino\wiring_pulse.S" -o ing_pulse.S.o"  
"c:\Program Files (x86)\Arduino\hardware\tools\avr/bin/avr-gcc" -c -g -Os -w -std=gnu11 -ffunction-sections -fdata-sections -MMD -flto -fno-fat-lto-objects -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10605 -DARDUINO_AVR_NANO -DARDUINO_ARCH_AVR cores\arduino" variants\eightanaloginputs" res\arduino\hooks.c" -o ks.c.o"
 
Error compiling core
cc1.exe*: error: -fno-fat-lto-objects are supported only with linker plugin
Build failed for project 'Sketch7'

Thanks for your quick response, Tim. I used Visual Micro for a few years now and love it. It's a good product. 

The problem was with the Arduino IDE. When I opened it from Windows it ran v1.6.1 so I updated it and got a new error. VM wasn't able to find the "arduino.h" and "pins_arduino.h" files. Long story short, I was able to track down that there were three different Adriano IDEs on the hard drive. I suppose over the years I installed them in different locations for one reason or another. The version in the Programs folder in the Arduino folder in the Documents folder were both 1.8.1 and were installed last fall. 

The setup window in VM Explorer pointed to the one in the Program folder. So I uninstalled VM and the Arduino IDE and used a registry cleaner. I moved the 3rd party libraries to a safe place and deleted the Arduino folders. 

After that, VS refused to start and hung after complaining it couldn't find VM and that VM was installed - go figure that one. so I repaired VS and once running, closed it and installed a fresh copy of the Arduino IDE and VM downloaded from your site and not from the the Extension Manager (if that even made a difference). 

And now it works just fine. The code compiles and VS seems to be working a bit faster - but that might be in my imagination... lol. 

Please consider the problem fixed and I am happy to hear that VM won't depend on the Arduino IDE in the future. Again, this is a great product. Thanks. 

-Mike