BLANK FROM FLAT FILE IS TAKEN AS ? IN SAP HANA

Hello Experts,

I have been assigned a task where i have to upload a flat file into the hana system which will be later converted to a universe and then developed into a dashboard.

Now, the problem that I am facing is the excel sheet contains columns in which the fields have a space, when this is uploaded in HANA , it is getting interpreted as a '?'

I have done the setting SAP HANA -> runtime -> common -> remove the ' ?'

But still I am getting '?' in one of my fields.

This is  necessary to be eliminated because a universe will be created and thus a dashboard.

I have attached the snapshots.

Kindly help

Thanks in advance