C/C++ :: Node Insertion Into Boost Libraries - PTree Not Working In MSVC

I'm currently working on a Microsoft (unmanaged) C++ project which utilizes Boost C++ libraries. It's been quite a while since I've done C++ and I have no previous experience using the Boost libraries.

We are using Boost 1.55 and MSVC 2013. We used CMake to generate the Visual Studio solutions and projects based on the original project layout.

We've successfully built and tested on other environments. In the MSVC - Windows environment, we've run into issues using Boost's Property Tree support. Specifically, the issue seem to center around trying to put properties into PTNodes.

Consider the following code snippet:

void XXX:: SomeFunction() {
PTnode ptNode;
ptNode(Mapper::KEY_INPUT, Tracer::SOME_VALUE);
ptNode(Mapper::KEY_OUTPUT)(Tracer::SOME_OTHER_VALUE, Tracer::ADDITIONAL_VALUE);
SetResults(ptNode);

[Code] ....

This work around seems insert the nodes successfully into the tree.

We are able to verify by finding the inserted items in ::SetResult().

Why this might be failing in VisualStudio C++?

Is this an issue of compiler flags?

precompiler definitions?

Linker options??

Memory mode/model??

Are there some basic behaviour differences in MSVC C++ and other C++ environments which we are unaware of?

I've tried to identify all instances of the node insert pattern and use the work around. But, we really need to find out what the issue is (as there could be other manifestations).