@akshaysawant Hijacking Mr. Dolich's thread:) Let's say: If your source module has 3 dimensions: Products, Customers and Countries and your target module has 2 dimensions only : Products , Customers If you try to refer the data from source module to target module then there are two possibilities 1. Anaplan automatically takes the data from the top level of Countries dimension and bring it to Target module provided you have the "Top Level" Set for Countries dimension 2. Anaplan will throw you an error saying that Formula is invalid as Countries doesn't have an Inbuilt Top Level. In your case you must have already Top Level Set for the dimension which was not matching between the source and target modules Hope that helps Misbah
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