RDLC sub report integration-- Object reference not set error

Question

Hi,
In our Application we are using RDLC reports..we have a main report and a sub report.I am getting "Object Reference not set to instance of an Object......."Error
when I am adding a row group in Sub Report...I am new to RDLC designing please help me.....

lakshmi sowmya · Answer

Hi when we are adding group by in main report we are getting only first row record later rows are not getting binded.

Santhosh Kumar Jayaraman · Answer

Check your parameters for sub report. Might be one of the parameter passed from  main report is null. This could be one of the possible reason.
Other reasons might be
Incorrect sub report name