C++ debugging using VS 2012

Question

I am new to C++, and my question might be a bit stupid.

I got a big program which was written in C++. The developer built the program in VS 2013, but I only have VS 2012 on my computer. So, I changed the platform toolset from V120 to V110, and changed the ToolsVersion="12.0" to ToolsVersion="4.0". I also have .NET framework 4.5.1, 4.5 installed on my computer. My computer system is windows 7 64 bit.

Then I can successfully build the program. But when I ran it from the debug folder, and loaded my data, I got the error:

"Debug Assertion Failed. Program:C:\windows\system32\mfc110d.dll File:h:\envision\src_6696\envdoc.cpp Line 1633."

I click debug and can find that there is an assertion error:

catch( ... ) { CString msg = "Error thrown during Init() when initializing the "; msg += name; msg += " plugin."; Report::ErrorMsg(msg); ASSERT(0); }

But it is almost impossible for me to figure out where the error is originated from.

So, I have many my specific questions:

1. What is the possible problem for this?
2. Do I have to use VS 2013 to solve the problem?
3. Is it because of the mfc110d.dll or the .netramwork?

Any help will be greatly appreciated. Jim