I am new to Jaspersoft. I downloaded and installed Jaspersoft Studio 6.0.3 onto my MacPro and launched the 'Designing a Report with Jaspersoft Studio' wiki page. I successfully completed the tutorial for creating a simple report and so I proceeded to the 'Creating Charts and Subreports with Jaspersoft Studio' tutorial.
I followed the instructions carefully but when I went to preview the chart I received the error message 'Category series name is null'.
As I was following the tutorial instructions carefully, I was surprised to get such an error. I searched the internet using Google to see whether anyone else had experienced this problem. The error message does seem to come up in a number of circumstances but nobody else seems to have experienced it while trying to do the tutorial and so the answers I have found have not been helpful.
The only information I have been able to glean from the web is:
I must provide three things for the bar graph to work: a Category, a Series and actual data
I must not have any null values in any of those three things
The tutorial lacks detail around the section that talks about setting up the chart and next to the Category field the note actually states "For the example we don't need a category, so here you can insert a void string". This seems to contradict what I have since found online, but when I try to add another 'category' column to my dataset and use that column for the chart 'Category' field, I still get the same error.
The tutorial SQL query for the chart subreport does not return any null values, so I am at a loss as to how to make this tutorial work.
I would really like the Jaspersoft product to work as I am searching for a replacement for our existing Oracle BI software and Jaspersoft has great potential. I would just like to be able to prove to my employer that it can do what we need and being able to complete the basic tutorial examples would go a long way to achieving that goal.
