Hello Wenjun,
I have encountered another problem. I have done the settings that u had suggested. It was working appropriately till this point . But now , Inspite of the setting I am coming across the same error in one of my fields. The ' ? ' is appearing in one of the fields . I have to create a universe using this data and further lead it to a dashboard and this data with the '?' has to eliminated. I have attached the screenshot with this. Kindly have a look and suggest me some solution.
Thanks and Regards
Aditya Dixit