Why KUpload+ throws an “Arithmetic Overflow exception” When I am submitting the upload form?
Form data Error exception is thrown in following cases, please check your form data that you are submitting. 1) Form is not in format as specified in standard multipart HTML forms as defined in RFC 1867. 2) Form data has some invalid or very large data in fields, such as ViewState contains very large object. If problem caused by Large ViewState then increase Upload buffer size in web.config file. Default size is 2048 bytes you can increase this size.