Copy webi report or object from folder to another fails

We had .NET SDK Code that was working in 3.1 but seem to be running into few issues with some methods in 4.1 .

One example was copying a report or an object from one folder to another . It throws an error : File Repository Server Error

Below is a code snippet and also attached the whole code.

While debugging the code fails at red.

                    if (sourceObject.Kind == "Webi")
  query = "Select SI_ID,SI_CUID,SI_NAME,SI_DESCRIPTION,SI_UNIVERSE,SI_FILES FROM CI_INFOOBJECTS WHERE SI_ID = " + sourceObject.ID.ToString();
                      
                    else
                     query = "Select * FROM CI_INFOOBJECTS WHERE SI_ID = " + sourceObject.ID.ToString();

                    InfoObjects boInfoObjectsToCopy = GetInfoStore(infoObj).Query(query);

foreach (CIRTInfoObject destinationObject in Destination)
                            {
                                InfoObject infoObject = boInfoObjectsToCopy[1];
                  InfoObject infoObjectCopy = boInfoObjectsToCopy.Copy(infoObject, CeCopyObject.ceCopyNewObjectNewFilesKeepFileName);

                                infoObjectCopy.ParentID = destinationObject.ID;
                                GetInfoStore(infoObj).Commit(boInfoObjectsToCopy);
                                response.IsSuccessfull = true;
                            }

I'm attaching the code. Any thoughts appreciated.