I got the same error -> java.lang.Exception: Invoke failed: o:JExcelApiExporter->exportReport. Cause: net.sf.jasperreports.engine.JRException: Can't add cell. I put IS_DETECT_CELL_TYPE become false in parameter. That's work for me!
Sori CBox,, but I want to supress the group Header include the elements inside. so I must put the condition into the printWhenExpression of the Group Header, not to the TextExpression of the element.
Thank you Cbox..
It doesn't work suki,, i put that in the 'print when expression' of the group header. That because the PrintWhenExpressions is evaluated as "NOW" like Cbox said.
Thanks suki :)
I can print variable which from 'sum of field' in group header with setting evaluation time become group and evaluation group become the name of that group. But I CAN'T set print when expression of the group header with that variable. example: Print When Expression in group Header is : $V{sum_amount} > 0 Pls help me..