Was the file shown with this icon inserted using Insert PDF?
Is there a custom menu set installed on this layout?
Previously when we insert the pdf file from desired path the file was previewing but from last six days only icon is previewing on those file which were previously inserted pdf file from insert pdf menu. Only Standard file menu is there. Insert pdf is showing disable in menu bar.so no more file is inserting.
If you export the file from the container field and then double click the exported file, does it open? If so, what application opens if?
If you change your layout temporarily to use the standard menu set, do you regain the ability to insert a PDF into the container field?
Is this a Mac or Windows system?
Yet I have change PDF software to adobe then its previewing the pdf file and also Showing PDF option in insert menu bar. It means that only adobe pdf is workable for filemaker.