Unable to Mock functions returning CString in C++

I am using Isolator++ professional version 4.3.1.0

I replicated the same code in the question: Issue with return value of a method that returns CString - Typemock Q&A

Code to be tested:

class CIniFileStub

{

public:

CString GetValueTest1()

{

return "Test1";

}

};

Test Code:

TEST_METHOD(TestCIniFileStub)

{

CIniFileStub* fakeIniFile = FAKE<CIniFileStub>();

CString param1("GeneralInformation");

WHEN_CALLED(fakeIniFile->GetValueTest1()).ReturnPtr(&param1);

CString temp = fakeIniFile->GetValueTest1();

}

The WHEN_CALLED line throws the exception: Unhandled exception at 0x00007FFA1EA2AB3D (UnitTests.dll) in testhost.exe: Stack cookie instrumentation code detected a stack-based buffer overrun.

Please help with this issue.

thanks in Advance !