Hi, 

https://docs.ifs.com/techdocs/Foundation1/050_development/022_user_interface/030_aurena_dev/100_how_to_develop_aurena_pages/030_customize_the_client_page/030_add_array_projection/ 

I tested the code in this link in Aurena. I couldn't run Developer Studio 18. This error occurred. What could be the reason?

ERROR: Cannot find projection datasource for rCustomerOrderLines]. Type: ListDefinition, Name: CustOrdLinesList,

//Added for the array examplelist CustOrdLinesList for CustomerOrderLines {    label = "Order Lines for $(parent.OrderNo)";    field LineNo;    field PartOwnership;    field StagedBilling;    field SaleUnitPrice;    field Cost;    field PartPrice;    field DeliveryConfirmed;    field TaxLiability;    field MakeReservation;    field DeliveryType;    field DistrictCode;}