How to add PartialCUIFile Tab to current workspace | 2012

[matinau]

I'm having difficulty accessing the CustomizationSection for a particular PartialCUI which I need to return the RibbonTabSource using AutoCAD 2012.

Here's the snippet

var cuiMain = (string)Application.GetSystemVariable("MENUNAME");

var csMain = new CustomizationSection(cuiMain);

//*** This line return null even when the PartialCUI exists? ****

CustomizationSection csPar = csMain.getPartialCUI("myPartialCui");

RibbonRoot rrPar = csPar.MenuGroup.RibbonRoot;
RibbonTabSource tabPar = rrPar.FindTab("RBNU_0001");

Workspace curWs = csMain.getWorkspace(curWorkspace);

csMain.MergeOrAddTabToWorkspace(curWs, tabPar);

if (csMain.IsModified)
{
    csMain.Save();
    Application.ReloadAllMenus();
}

Can you spot where i'm going wrong?

[matinau]

Found a solution by ditching the GetPartialCUI method

var curWorkspace = (string) Application.GetSystemVariable("WSCURRENT");
var cuiMain = (string)Application.GetSystemVariable("MENUNAME");
var csMain = new CustomizationSection(cuiMain);

PartialCuiFileCollection pcfc = csMain.PartialCuiFiles;

string cuiMyPar = null;
foreach (string cui in pcfc)
{
    if (cui.ToLower().Contains("myParCui.cuix"))
    {
        cuiMyPar = cui;
    }
}

if (cuiMyPar == null || !File.Exists(cuiPar)) return;
var csMyPar = new CustomizationSection(cuiPar);

RibbonRoot rrMyPar = csMyPar.MenuGroup.RibbonRoot;
RibbonTabSource tabMyPar = rrMyPar.FindTab("RBNU_0001");

Workspace curWs = csMain.getWorkspace(curWorkspace);

csMain.MergeOrAddTabToWorkspace(curWs, tabMyPar);

if (csMain.IsModified)
{
    csMain.Save();
    Application.ReloadAllMenus();
}