Hi @tingtingxia ,
As I can see in the Screenshot . there is only one dimension (P5 SKU SS: National) with 2 line items (Today Date, Clear Dates) in the Source Module from which you are trying to import into the target.
that is why you are not able to see other dimensions in the dropdown.
Can you please show us source Module where you have created line item "Clear Dates" ?
I created the line item in the same module as the target line item to clear following @Harsha 's advice at the very beginning, meaning both line items are in the same module.
why don't you show subsidiary line items in the saved and map those items to list.
When I replicated your scenario, task is the line item which has subsidiary view.
When I selected this option, I got the error what you are getting.
So I showed that line item in my saved view and mapped task line item that list. After this action was successful.
Understand that. But my subsidiary view line items are crossed with 2 dimensions as below.