We have released InDesign 2020.0.1 with a lot of stability fixes. We recommend you to upgrade to latest version (if you’re not already on it) as it is more robust.
If you still face this issue even after updating, please send the following information to firstname.lastname@example.org:
• Reproducible Steps – What were you doing when InDesign issue occurred?
• Video recording of the issue?
• Is(Are) the issue related to a specific document(s)/asset(s)? If yes, could you provide the document(s)/asset(s) to us? Please package the entire document (To package the document, choose File → Package…)
Adobe InDesign Team
An error occurred while saving the commentJ commented
Having same prob. saving as idml in latest Indesign CC and client can't open in InDesign CS6. (Have tried saving as idml, packaging to get idml, renaming as .zip then changing back to .idml). Error message reads: Cannot open the file "tester.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.