What is the difference in using IRunTask + IRenderTask and using IRunAndRender task ?

bholenath

Hello All,<br />
I'm using BIRT 2.2 and we are extending BIRT APIs to write a custom report engine component.<br />
I found some strange things while using the IRunTask + IRenderTask combination-- perhaps I am not aware of its functioning and purpose - and hence this question.<br />
<br />
When I use the IRunAndRenderTask, the generated report consists of 60 pages and there is no problem in it. <br />
But when I use the combination of IRunTask and IRenderTask <em class='bbc'>for the same report design file</em>, the number of pages in the generated report differs -- its 120+. <br />
Every alternate page on this report displays a few records and the rest of the portion is blank.<br />
<br />
I would like to know few things about this strange behaviour:<br />
1. Why is there a difference in the number of pages generated by each approach ?<br />
2. Why is the combination of IRunTask and IRunTask generating an extra page with only few records -- and the remaining page section is blank ?<br />
<br />
Kindly reply with your inputs over this strange behaviour. Any clarification over the same will be very helpful for me.<br />
Many thanks in advance,<br />
<br />
Cheers,<br />
Amit