Hi Terry,
Thank you for your interest in Syncfusion products.
We have analyzed the provided file and we are little unclear that which API cause the issue error and details of error message. So, we request you to provide the details of the error message and API details with code that you are using to export the grid to csv file. That will be helpful for us to assist you further at the earliest.
Regards,
Arulpriya Ramalingam