Thanks for the output. Can you please ensure that  vMicro > Compiler >  Verbose is enabled? If not then repost the output.

Okay thanks. 

If build>clean solution doesn't fix it then please zip and email your .vcxproj file from the current sketch folder. The email address is available above in the yellow box.

Thanks

No email has arrived. Please check for fail report.

Thanks

Thanks, arrived 30 mins ago.

It looks like we need to extend our error reporting. Some sort of issue resolving library paths. 

Do you get the problem if you create a new project? If not then please zip and email the entire jr_rotor_control folder and sub folders if there are any.

Thanks

Thanks for sending the code. The problem is reported if you switch between boards or do anything that attempts to refresh intellisense but the error doesn't give much away. We will improve the error.

The problem is caused by an extra double quote on the #include "configuration_EEPROM.h"". The Arduino IDE reports the error as "stray '\357' in program"

A second problem with the code which you would encounter after fixing the first is that "configuration.h" should actually be #include "src\configuration.h".

#include "configuration.h"
#include <EEPROM.h>
#include "configuration_EEPROM.h""
 

should be ....

#include "src\configuration.h"
#include <EEPROM.h>
#include "configuration_EEPROM.h"
 

Another tip would be to click the small icon above the solution explorer called "show all files". It will show you that one of your files is not included in the project. You can right click and include the file. The file is in the root of the project therefore Visual Micro would compile the file however it is good practise to ensure all your sources are included properly in the solution explorer. This will avoid other confusion later on and also allow you to use source control in the future.