I am running Windows 10 with IDL 7.1.

I am using an IDL widget in a windows forms C# project. I have an IDL script "pedAnalyze" which takes 3 arrays as input as follow "PRO pedAnalyze, xyeizz, Kon, PedSlope, PWF".

This is the Initialization in C# code:
{
IDLDrawWidget2.IdlPath = Lines[0];
IDLDrawWidget2.DrawWidgetName = "DWidget_Name";
n = IDLDrawWidget2.InitIDL(this.Handle.ToInt32());
if (n == 0)
{
// MsgBox "IDL failed to initialize"
//txtDebug.Text = "IDL failed to initialize";
MessageBox.Show("IDL failed to initialize");
System.Environment.Exit(0);
}
IDLDrawWidget2.CreateDrawWidget();
IDLDrawWidget2.SetOutputWnd(IDL_Output.Handle.ToInt32());
WorkingDirectory = "CD, '" + path + "'";
IDLDrawWidget2.ExecuteStr(WorkingDirectory);

// Set IDL Color table to B && W
IDLDrawWidget2.ExecuteStr("loadct, 0");

// Compile IDL code
IDLCommand = ".COMPILE " + path + @"\IDLProcedures\idl_basic_userLib.pro";
n = IDLDrawWidget2.ExecuteStr(IDLCommand);
if (n < 0)
Interaction.MsgBox("idl_basic_userLib.pro not found or Compile Error");

IDLCommand = ".COMPILE " + path + @"\IDLProcedures\pedAnalyze4S.pro";
n = IDLDrawWidget2.ExecuteStr(IDLCommand);
if (n < 0)
Interaction.MsgBox("pedAnalyze4S.pro not found or Compile Error");

IDLDrawWidget2.SetNamedArray("xyzeData", xyzeData, true);
IDLDrawWidget2.SetNamedArray("Kon", Kon, true);
IDLDrawWidget2.SetNamedArray("PWF", PWF, true);
IDLDrawWidget2.SetNamedArray("PedSlope", PedSlope, true);

IDLCommand = "pedAnalyze, xyzeData, Kon, PedSlope, PWF";
IDLDrawWidget2.ExecuteStr(IDLCommand);
}

I am printing "Kon" array in the starting of script to make sure if the array is passed correctly, which it is. The IDL script makes changes to the "Kon" values, I also check that by printing at the end of the script and by verifying plots. Why don't I see those changes reflecting back in C# array "Kon" . I am using SetNamedArray which is suppose to be sharing the array. I have this script correctly working on VB6.