can't fill the table item from my object data source

[Mohammed]

Hi team,
I use object data source to fill the table item.
i got the below error
An error has occurred while processing Table 'table1': Failed to compare two elements in the array. ------------- InnerException ------------- Cannot compare value of type Bartizan.LeadsLightning.BusinessLogic.tblRLRExhibitorQRCode with Bartizan.LeadsLightning.BusinessLogic.tblRLRExhibitorQRCode

while if i use the sql data source it is working perfectly.

we use object data source always so I hope i can find it easy to use it in the reporting project.

[Hadib Ahmabi]

Check if your sorting expressions are valid (try to remove them).
Also see the full error from the Output window.