DBDilli Babu Nandha Gopal Syncfusion Team March 27, 2019 04:12 AM
Thank you for contacting Syncfusion support.
We suspect that the reported problem might be caused due to file extension of the saved Excel file. If the Workbook is saved in .xls format then, 65,536 by 256 rows and columns will be preserved. So, we request you to save the Workbook in .xlsx format to resolve the issue.
To know about maximum range of Rows and Columns in different Workbook format, please refer the following link.