AS-IS failure modes

Failure	Detection	Current handling	User-visible result	Data risk	Recovery	Target handling
Network unavailable	filesystem/XML operation	incomplete evidence	install/update may fail	stale files	unknown	use valid local cache
Partial copy / version skew	no proven transaction	copy/delete code	missing module	load failure	reinstall	staging + atomic pointer
Missing DLL / corrupted Settings.xml	generated load or loader parse	warnings/behavior varies	command/ribbon missing	none to DWG at load	manual repair	manifest validation
One of 20 modules incompatible	._netload result	sequential continuation unknown	partial functionality	inconsistent UI	manual repair	one entry package compatibility check
Repeated NETLOAD / duplicate ribbon	runtime	module-specific	duplicate UI possible	UI only	restart	idempotent registry
No write permission / AV lock	file operations	errors/messages vary	launch blocked	partial install	manual repair	diagnostics and no activation
AutoCAD already running / profile missing / LISP/BAT absent	not fully proven	unknown	bootstrap may not execute	none	manual	explicit duplicate policy/preflight
Update during use	legacy copy model	unknown	locked or mixed files	runtime instability	manual	versioned immutable directories