I have created the same udf in sales order detail and SO invoice detail entities.  Both same type - string - and same size (20).  In the data source from  SO invoice detail I have selected "copy from sales order and for data source I have selected SO_SalesOrderDetail.  For the I have selected the udf that I created at the sales order detail.  I have marked the Ignore if null check box.  Nevertheless, this udf is not populating the invoice detail for some reason.  I have duplicated this issue with ABC demo data in the Sage 100c 6.10.2.0.

Has anyone experience this before in this version?