New Post: Use of drc library, instability ?

 Public Sub New()
        InitializeComponent()
        Dim envPath = System.Environment.GetEnvironmentVariable("PATH")
        Dim rBinPath = "C:\Program Files\R\R-3.0.0\bin\i386"
        System.Environment.SetEnvironmentVariable("PATH", envPath + Path.PathSeparator + rBinPath)
        REngine.SetDllDirectory("C:\Program Files\R\R-3.0.0\bin\i386")
        engine = REngine.CreateInstance("RDotNet")
        engine.EagerEvaluate("library(drc)")
    End Sub

    Public Sub close_app() Handles Me.FormClosed
        engine.Close()
    End Sub