I run wsusoffline/client/UpdateInstaller.exe
and it reports:
Listing update files...
Warning: Update kb2538243 (id: 729a0dcb-df9e-4d02-b603-ed1aee074428) not found.
Warning: Update kb2993928 (id: f6c4261c-9fae-442c-9bfc-7b37ba42f806) not found.
Warning: Update kb4462937 (id: b6dd04cb-e746-4a04-83d4-4b761c784f00) not found.
Warning: Update kb4477029 (id: 06ac9fa5-7fee-4c8c-94d7-c1ef19d6a477) not found.
and it does not install any updates.
Any ideas?