I am getting the following when I try to compile. 
Compiling 'U1407RCO-BLP-MG-AngPunGSR' for 'Arduino Uno'
core.a(main.cpp.o)*:In function `main'
main.cpp:undefined reference to `setup'
main.cpp:undefined reference to `loop'
Error creating .elf

Visual Studio 2012 v11.0. update 4
Visual Micro 1.1407.10
Arduino Uno connected to Com10

Sketch has both void setup()  and void loop() and there is only one .ino file in the project ("U1407RCO-BLP-MG-AngPunGSR.ino"). There are some comments and static const and variable declarations before the setup function and three more functions after the main loop, syntax is correct, but it seems that the compiler is failing to recognise the functions 

Other previous projects load and compile ok.

Compile in either debug or release config gives the same result.

Any clues anyone?

Ah-ha - I should have thought to try that. No it doesn't and gives the more helpfull error message:
Sketch names must contain only basic letters and numbers (ASCII-only with no spaces, and it cannot start with a number).
Bang goes our project naming convention, or rather we can still name projects the way we want but will have to not use the project name as the sketch file name.
Thanks for the help. Possibly VisMicro could improve the error message and/or check sketch names as they are created.
RogerCO

In Visual Studio
File - New - Sketch Project
Enter a project name including a hyphen and an underscore
"Test-Project_title"
The sketch file will be created as "Test-Project_title.ino", the project name will be "Test-Project_title" but the Root Namespace under Project Properties will be "TestProject_title"
So it looks like VisMicro is accepting the project name and changing the Root Namespace to match the Arduino compiler requirements but not changing the name of the sketch file it creates.
Sounds like a fairly minor bug fix to automatically strip out unwanted chars in the name before creating the sketch file when creating the project.
RogerCO

note: Fixed in releases towards the end of 2014, see release notes