Hello!

 Thank you.  This is my first time I do a sub-report.

 I understood from your reply that once a master report is running well on a web application, then, there is no further step to do in the code behind in order to run a sub-report, and I started from there.

 I changed my sub-report logical design and it worked.

How I solved the problem:

The data needed to be displayed in the sub-report was also in a group section.  It seems that there was kind of recursive calls (maybe)!  So, I changed the logic and made simple sub-report and have the data displayed on the details section of the sub-report.  (And life is good!)

 I still don’t understand how CR was able to figure out the table/query needed for the sub-report at run time of the web application!!

Could you please explain how?  

Thanks