Bug 167545 Copy a cascading parameter group and paste it to another parameter group causes an exception thrown
Steps to reproduce: 1.Copy a cascading parameter group using short cut key "Ctrl+x"/"Ctrl+c", or choosing context menu "Cut"/"Copy"; 2.Paste it to another parameter group using short cut key "Ctrl+v", or choosing context menu "Paste"; Expected result: The source one is pasted in the destination. Actual result: An exception thrown org.eclipse.birt.report.model.api.command.ContentException: The Cascading Parameter Group("Source") is not allowed in the slot (parameters) of Parameter Group("Destination").
UI/org.eclipse.birt.report.designer.core/src/org/eclipse/birt/report/designer/util/DEUtil.java
if ( !StringUtil.isBlank( displayName ) )
			{
				if ( includeElementName )
				{
					return elementName + " - " + displayName; 
				}
				return displayName;
			}
			return elementName;
		}
		return ""; 
	}
	/**
	 * Gets the master page count.
	 * 
	 * @return the count of master page
	 */
	public static int getMasterPageAccount( )
	{
		SlotHandle slotHandle = SessionHandleAdapter.getInstance( )
				.getReportDesignHandle( )
				.getMasterPages( );
		Iterator itor = slotHandle.iterator( );
		int account = 0;
		while ( itor.hasNext( ) )
		{
			account = account + 1;
			itor.next( );
		}
		return account;