Hi Bart,
We checked for a while, but still we are not sure why this error occurs. so we have attached a sample which will bind the grid to datasets with addnew row functionality. Please download the sample by clicking the link below, and do let us know if you are able to reproduce the error in this sample
Bindingtodataset_forum52199.zipI think, you might have missed to give adding new record feature for DataSet schema in your application, but not sure this causes the issue.
Thanks for using Syncfusion products.
regards,
B.Gokulkumar