Hi, there i am trying to make a gallery by grouping them by two columns namely income and expenditure.
Under each of this columns, i would like to display the description of item and its amount.
In gallery item property i have written a formula, which is grouping the data source nicely as per the need.
However in gallery, when i try to show a description form the derived formula, i am not able to do this. It showing the error.
my gallery :
my datasource :
