InDesign Document won't open.

[McHugh David]

Hi Guys.

I have the most recent up to date CC. I opened and worked on an InDesign document that was CS4. I saved it as an 'idml' which can be opened down to CS4.

No problem. However, when I went to open this document in CC I got this message:

Cannot open the file "Cleggs.idml". Adobe InDesign may not support the file format, a plug-in that supports the file format may be missing, or the file may be open in another application.

Well, it wasn't open in another application, as I explained above, it's saved correctly for what I need it for. Which leaves plug-ins. I haven't had this problem before, it was working fine last night. If it is the plug-in, how do I know? and how do I get the plug-in?

Thanks for any help you can give!

[McHugh David]

As a further piece of information, I opened up another document that was saved the same way, and had no problems. Still can't open the other document though.

[Scott Falkner]

Does this InDesign file link to another InDesign file? That is, is an INDD file placed in it?

[McHugh David]

Hi Scott,

No, it's just a ton of images in the file and text.