Crash when trying to Save As

OK, from a couple of other sources (which I lost track of where they are), I have replicated this solution across several projects that were having the same problem (we found more, all clones of one that did not previously have problems, and all of which also didn’t have problems until a couple of days ago).

Here is my ritual:

If UE4 crashes during ‘Save As’ or ‘Save’ (usually on Maps/Levels [.umaps]) …

1) FIX REDIRECTORS

1.1) From the Content root, right-click on each folder, and choose ‘Fix Up Redirectors in Folder’.

1.2) Then do a File > ‘Save All’ – this should trigger and process saving anything that was updated by the various ‘Fix Up Redirectors in Folder’ commands.

1.3) File > ‘Save Current’

1.4) If that went OK, then File > ‘Save Current’ again (I had this fail once, and had to re-do the ‘Fix Up Redirectors in Folder’).

1.5) Then do a File > ‘Save All’ – nothing “should” happen here, but may – if so, cross your fingers.

2) TRY Save As AGAIN

2.1) Now try the ‘Save As’ on the currently opened map (this should be the one that was crashing).

2.2) This may likely take longer that usual, grab a bagle.

2.3) Change your Project Settings - Maps - default settings to the new Map.

2.4) Close the Engine.

3) TEST THE FIX

3.1) Re-open the project.

3.2) Try doing another ‘Save As’.

If it still crashes … call a more nerdier nerd.