Latest iNotes cannot open some attachment if DWA 8.5 is not installed. The error message was about not being able to access the attachment that it saved in the temporarily internet folder. However, when I try to search for the folder it mentioned, the folder doesn’t exist. It seems that iNotes try to save the attachment to a temporarily folder and fails if DWA 8.5 is not installed.
Installing DWA resolved the problem.