I have CS4, and I mainly use Photoshop and InDesign. I tried to open an InDesign file the other day and I can't. I've never had trouble with this before. This is the message I get:
The document "..." uses one or more plug-ins which are not currently available on your system. Do you want to open anyway?
The box above this message says: SHAREDCONTENT.RPLN
If I click "OK," to open anyway, this is the message I get:
Cannot open "...". Please upgrade your plug-ins to their latest versions, or upgrade to the latest version of Adobe InDesign.
And there is a long list of plug-ins above this that need to be updated. I ran the Adobe Updater and it says that "There are no updates available at this time." Therefore, I don't know what to do.
Thank you for your help.
The file you are trying to open has been saved in a version newer than CS4. You can try downloading the trial version of the current ID and export the file from there to an IDML file to work with in CS4.