Bug 193913 Adding a aggregate with a column binding name that already exists should display a proper message
Build ID: 2.2RC3 Steps To Reproduce: 1.Add table to report 2.Add aggregation to table (Column Binding Name = "TEST") 3.Remove aggregate from table (the binding remains in the list of column bindings for this table) 4.Try to add the same aggregate to table (Column Binding Name = "TEST") This causes the error as shown below: An unexpected internal exception occurred.Please see log for detail. Plug-in Provider:Eclipse.org Plug-in Name:BIRT Designer UI Plug-in ID:org.eclipse.birt.report.designer.ui Version:2.2.0.v20070613 Error Code:Error.GUIException.invokedByUnexpectedException Error Message:Caused by java.lang.NullPointerException. It should rather display a message that the binding already exists or just use the available binding for this aggregate. More information:
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/dialogs/BindingDialogHelper.java
break;
				}
			}
			this.newBinding.setName( txtName.getText( ) );
			this.newBinding.setDisplayName( txtDisplayName.getText( ) );
			this.newBinding.setExpression( cmbDataField.getText( ) );
			this.newBinding.setAggregateFunction( getFunctionByDisplayName( cmbFunction.getText( ) ) );
			this.newBinding.setFilterExpression( txtFilter.getText( ) );
			if ( btnTable.getSelection( ) )
			{
				this.newBinding.setAggregateOn( null );
			}
			else
			{
				this.newBinding.setAggregateOn( cmbGroup.getText( ) );
			}
			this.binding = DEUtil.addColumn( getBindingHolder( ),
					this.newBinding,
					true );
			for ( Iterator iterator = argsMap.keySet( ).iterator( ); iterator.hasNext( ); )
			{
				String arg = (String) iterator.next( );
				AggregationArgument argHandle = StructureFactory.createAggregationArgument( );
				argHandle.setName( getArgumentByDisplayName( this.binding.getAggregateFunction( ),
						arg ) );
				argHandle.setValue( ( (Text) argsMap.get( arg ) ).getText( ) );
				this.binding.addArgument( argHandle );
			}
		}
		else