Thanks for your inquiry. We will appreciate it if you please share your sample code along with input and output documents here. It will help us to address your issue exactly…
Thanks for sharing additional information. You need to convert string to integer in your template as following.
<<[Row.sum(s => Integer.parseInt(s.VarNumber))]>>
Please note you need to add java.lang.Integer class to Known External Type of Reporting Engine. Please check Setting up Known External Types section of following documentation for more details. It will help you to accomplish the task.Linqoutput.pdf (9.1 KB)