In an InDesign/InCopy workflow, the InCopy user doesn't need to open the .indd files, but instead they could work with the .icma (Assignments) files. This might provide you with a work-around for now? You mention it worked in CS7 - there was no such release. Are you referring to InDesign/InCopy CC (2017) maybe? In other words, it's an issue that started occurring ONCE you updated from CC (2017) to CC (2018)? Does this only happen for files that were created in the earlier version of InDesign? or also for files created in the latest version of InDesign. If it only happens in files created in earlier versions of InDesign, try opening the files in InDesign and use File > Save As, and save them as IDML files, then reopen the IDML files in InDesign and save them as INDD again, and see if that possibly resolves the issue. Does the issue happen on all systems that are running InDesign or InCopy and accessing server files? Or only on certain systems? Try resetting the preferences for InDesign/InCopy on those systems, and also clear any caches. https://helpx.adobe.com/indesign/using/setting-preferences.html For the server itself - have any updates been run or changes been made to the configuration of the server? Check the file permissions/priviledges for the files on the Server for the various users, e.g. InCopy vs InDesign users. Are permissions all set-up the same? Try rebooting the server - if you feel the issue is server related. Are you running InDesign / InCopy with administrator privileges on the troubled systems? If not, pls try testing with InDesign / InCopy installed with full admin privileges on the system. Or set-up a temporary new admin user on the systems and run from a totally new admin user account Report back with all your findings, and pls include information on: Type of Server, including server version the files are installed on. Operating system version on which InDesign / InCopy are installed. and provide step-by-step on how to replicate the issue. provide possible error log files.
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