@PaulU586

Open App Studio → Case types → your case → Data model and add a new Calculated field named Total transfer amount with the property name TotalTransferAmount (Decimal/Currency). In the Calculation, pick the source you need: if it’s a single amount, set it to .TransferAmount; if it’s a list, use the Sum option to total .Transfers().TransferAmount. Save the field, then open the view that shows the total and fix the reference to use .TotalTransferAmount (no space in the property name). If the calculated option isn’t available, first add a regular Decimal field TotalTransferAmount, then set it in a Data transform (post-processing of the step) to sum the amounts. Save and check in your changes, refresh the case, and try the exercise again. If it still errors, clear browser cache and re-generate the view from App Studio.