Symbols are like special characters in combobox,datagrid tree symbal

[Nallathambi, Varunkumar]

Hi,
                In my Flex to royale migration, the combobox aero , datagrid 
tree symbols are displayed as special characters. Do I need to add anything 
like env variable or style? Kindly advise me on it.

Regards,
Varunkumar N