3.4.2 ""External sharing process failed" error when packaging project

[DavidWard1]

This project packaged successfully 5 months ago (version 3.4.0?), but now after only minor updates fails to package:

The final entry in the log is nearly useless: "StatusMessage: The project package tool has started".

The projects contains six layouts and ten maps, but even when stripped down to a single layout and map with no references to the enterprise SDE database, it still fails with the same message.

Any suggestions?  Is project packaging broken in 3.4.2?

[DanPatterson]

Package Project (Data Management)—ArcGIS Pro | Documentation

Try the tool and limit the sharing/package version to 3.4 to rule out issues with sharing to older versions of Pro.

Also check that all edits are saved and you have cleared out your history/caches/any junk first.

Hopefully the options within the toolbox tool will provide more options to help you narrow the issue down

[DavidWard1]

I believe the project was clean, as Dan suggested, but there must have been something there that was interfering.  I created a new project and copied all database connections, styles, toolboxes, maps, and layouts into it, and packaging works as it is supposed to.