Inline button to update images when the image field is blank

[Yunus88]

Hey
So i have an asset form where im generating an Asset Code which will need to be printed and pasted on an asset.
I'd like to then have a form where these images can be updated. 
So, only images where the image field is blank will be getting updated.

Using Data: Set the values of some coloumns in this row but it doesnt seem to be working.
Need assistance ! Thank you

[Markus_Malessa]

Screenshot or more details about how you are trying to accomplish this? Is your column of type File-Image or are you just trying to set the column value as text?