Thanks for the article @paul.rosal. I will leverage your post to share some learnings as well. We expireinced some data loss issues when using module to module import in the Target module. Mostly because of not fully understanding the default settings of "Clear target prior to import" in the settings of the import action. Module to module import is a two step process: 1. Clear the target 2. Import values from source to target The issue we are seeing in all our imports, is that Step 1 "Clear the target" is clearing more values than we intent to import. After a few hours of troubleshooting we now fully understand the behavior, which is best explained by your example where you set source line items to No Data. When Source Line Items are set to No Data, no values are actually imported, hence the dialog message after the import shows that nothing is updated. The reason values are cleared, is because Anaplan finds Matches between Source view and the Target module and Clears them as part of the Step 1 of the module to module import. This is also true in your other example, when we create a custom action to import Blanks (for lists and time) or '0' (for numbers), Anaplan first Clears values for us, and then imports Blanks and '0' where we ask it to import. The dialog message after the import will show us how many items were imported, but it won't tell us how many were cleared as part of Step 1. This creates confusion when we see more data is cleared, than we actually intent to set to Blank or '0'. There is an article explaining this behavior, however, I thought the above learnings will still be valuable to share with the group. https://help.anaplan.com/anapedia/Content/Import_and_Export/Import_Data_into_Models/Clear_the_Target_for_a_Module_Import.html
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