ASPxRadioButton - The "Invalid postback or callback argument" exception is raised if the ASPxRadioButton.GroupName property and the ID property of a parent Table control have the same value.

Hello Mike,
thanks for answer, in creating a sample project I have found the issue. The GroupName of a ASPxRadioButton can't be the same name as the ID of a parent object, the ASPxRadioButtton is child of, in this case a table named "MyTable", the Radiobuttons GroupName = "MyTable".
I don't know, this is a issue of DevExpress ? Please let me know your meaning. Thanks for your work.

Hello Guido,
Thank you for your reply.
I think the issue has another source. It seems like ASP.NET behavior. I have modified your project to use standard ASP.NET controls instead of ours. The result is the same.
When you assign a group name to radio buttons, they render the 'name' attribute with this value. The table also has the same value in its 'id' attribute. It seems to us that during page validation, the ASP.NET engine finds the Table control instead of the necessary radio button control with the same name, which causes an exception.
I have attached the project. Please examine it and if you have other questions, contact us at any time.
Best regards,
Vladimir

Thanks for your work!