Hi, I am really new to JasperReports, however I have succesfully generated report files using iReport. I am using the generated .jasper file within a web application to dynamically produce the report I need. When I try to run this report i get the Exception: java.lang.IllegalArgumentException: Null 'period' argument. I have searched through the documentation and samples but can't find where I should be setting this. The time period is correct in the .jrxml file and I think oit is ok in the .jasper file as iReport generates the.pdf report exactly as i want it to appear. Any suggestions or does anybody know of any examples showing how generate a time series report that may help me.
