Technote Details :: Form file field issue
Issue
When submitting data through a form, I get an error message saying: "File upload error: Error uploading file. No input of file type was submited."

Reason
This happens because on the page there is a File Upload server behavior, but the file field it is linked to is not recognized. This situation occurs when the file field used by the server behavior no longer exists in the page, uses a different name or the form does not handle file uploads.
Solution
There are several solutions to this issue, regarding the two possible reasons:
If the file field was removed from the page, and is no longer required, then the File Upload server behavior should be deleted as well. If the field was removed by accident, re-adding it to the page with the same name as used by the server behavior will solve the problem
If the file field still exists on page, but has a different name than specified in the server behavior, you can edit either the file field and enter the adequate name, or edit the File Upload server behavior and change the field name used to the new value.
If the file field exists and has the correct name, check if the form containing the field has its type set to multipart/form-data. Otherwise, file upload will not work. Simply setting the form type to the correct value will solve the issue.