Calling NWF.FormFiller.Functions.ProcessOnChange(NWF$('#' + varCalc)) does not force the calculated value rule to fire and update the control. Is there a way to get this value?
// Force a process for the calculated value control
NWF.FormFiller.Functions.ProcessOnChange(NWF$('#' + varCalc));
NWF$('#' + varSingleLineOfText).val(NWF$('#' + varCalc).val());