SSIS- The Element Cannot Be Found In A Collection. This Error Happens When You Try To Retrieve An Element From A Collection On A

hi,

this is sanjeev,
i have SSIS package, using my c# program i want to add one execute package task to this package's sequence container.


it is creating the new package with out any probelm. but when i opened the package and try to move the newly created exeute package task it is giving the following error.


the element cannot be found in a collection. this error happens when you try to retrieve an element from a collection on a container during the execution of the package



this is my code



{
Package pkg = new Package();
string str = (string)entry.Key;
pkg.Name = str;
alEntity = (ArrayList)entry.Value;

ConnectionManager conMgr;
Executable chPackage;
TaskHost executePackageTask;

Microsoft.SqlServer.Dts.Runtime.Application app = new Microsoft.SqlServer.Dts.Runtime.Application();



//string PackagePath = @"c:Genesis.dtsx";

//p = app.LoadPackage(PackagePath, null);
p = new Package();
p.LoadFromXML(parentPackageBody, null);


p.Name = str;

//Sequence seqContainer;

IDTSSequence seqContainer;
//seqContainer = (Sequence)p.Executables["Extract Genesis Data"];
seqContainer = ((Sequence)p.Executables[0]);

string packageLocation = @"Geneva Packages";
conMgr = p.Connections["SQLChildPackagesConnectionString"];






foreach (string val in alEntity)
{
if (seqContainer.Executables.Contains("Load_" + val) == false)
{
chPackage = seqContainer.Executables.Add("STOCK:ExecutePackageTask");



executePackageTask = (TaskHost)chPackage;
executePackageTask.Name = "Load_" + val;
executePackageTask.Description = "Execute Package Task";


executePackageTask.Properties["Connection"].SetValue(executePackageTask, conMgr.Name);
executePackageTask.Properties["PackageName"].SetValue(executePackageTask, packageLocation + ddlApplication.SelectedItem.Text + @"" + executePackageTask.Name);



}
}


app.SaveToXml(Server.MapPath("../SynchronizeScript/Packages/" + ddlApplication.SelectedItem.Text + @"") + str + ".dtsx", p, null);
}






please let me know what is the wrong in my code.

thanks in advance.

regards
sanjeev bolllina
sanjay.bollina@gmail.com