The file is a PDF Portfolio which can't be converted

The file is corrupted

The file is not supported by a Document Object server

The file is not supported by Foxit PDF Reader.Please open the file directly with Fox...

The file is too large

The file is too large to be attached. The maximum size of attachments is 2GB

The file is too large to open

The file may be read-only, or another user may have it open. Please save the documen...

The file name is invalid, which is usually because the file name is too long

The file name is too long