Upload has issue with some files "You did not select a file to upload"

[eluser]Unknown[/eluser]
[quote author="prato" date="1255573147"]Hey, there!

just a comment. The error message "You did not select a file to upload" occurs when you didn't set the field name of your image

like

Code:

$this->upload->do_upload();

the correct code is

Code:

$this->upload->do_upload("field_name");

[/quote]

I solve the same problem with this answer,thanks.