Created Unassigned: Does it exist error or bug in "REngine.GetInstance()"? [187]

Hi, I really would love to use it in my C# programs via RDotNet.

I've added R.net via Manage NuGet Packages in VS2013 (RDotNet runtime Version v4.0.30319).

Within Windows 7 I'm running R-3.1.0 a within my C:\Program Files\R\R-3.1.0\bin folder.

Here's code as below:

```
public double StandardDeviation(double[] examples)
{
double STD = Double.NaN;

//====Test 1. Start======
int Oos1 = 2;
int SiteCount1 = 5;
string KeyItem1 = "60";
string waferPass1;

if ((Convert.ToDouble(Oos1) / Convert.ToDouble(SiteCount1)) >
((Convert.ToDouble(100) - Convert.ToDouble(KeyItem1))
/ Convert.ToDouble(100)))
//return false
{
waferPass1 = "N";
}
else
{
waferPass1 = "Y";
}
//====Test 1. End======

// Initial/Using R.Net Component
REngine regine = REngine.GetInstance();

//====Test 2. Start======
int Oos2 = 2;
int SiteCount2 = 5;
string KeyItem2 = "60";
string waferPass2;

if ((Convert.ToDouble(Oos2) / Convert.ToDouble(SiteCount2)) >
((Convert.ToDouble(100) - Convert.ToDouble(KeyItem2))
/ Convert.ToDouble(100)))
//return true
{
waferPass2 = "N";
}
else
{
waferPass2 = "Y";
}
//====Test 2. End======
......................
}
```
The REngine.GetInstance() Made the same if-else statement (Test 1 & Test 2) get different result.

Test 1 if statement is correct (return false). Test 2 statement return wrong result (return true).

What's happened in 'REngine regine = REngine.GetInstance()' ?

After run 'REngine.GetInstance()' The Test 2 if statement got wrong result.

I have no idea about this. Is this bug in RDotNet?

Thanks for your help.