No problem! I think that happens when the server that runs the forum is being worked on. They leave it online while they work but stop people from posting for a bit.
I’m thinking it’s an odd translation for the abode of neither perception nor non-perception. A search for 不想入 in T5 discovers that it’s used three times, and the other two passages identify it as the highest of the heavens. At T5.167a4, there’s a list of heavens starting with the form realm, and 不想入 is the 28th, at the end of what looks like the four formless heavens (translated non-standardly):
第二十五名空慧天,第二十六天名識慧入,第二十七天名無所念慧入,第二十八天名不想入。
So, it really looks like a pre-nine-samadhis passage that was replaced later by everybody. Then, again, ~300 AD is fairly late in history. It may have been a minority version from one of the many obscure schools of Buddhism we know little about today.
That could be a fun dive into the Abhidharma ocean for a few days.
I haven’t looked at the alternate versions closely yet, nor tried to research academic opinions about what schools they belong to. I’m planning on taking a few months off from the translation project to do some of these types of really-interesting-and-really-time-intensive things. Right now, I’m knee deep in Buddhist cosmology (slogging through the hells – ugh!).
Right. The traditional story that developed, in which the Parinirvana Sutra plays a major role, Ananda didn’t become an arhat until after Mahakasyapa gives him a major upbraiding for being foolish at the end of the Buddha’s life (not getting the hint to ask for the Buddha to not choose Nirvana, failing to fetch him water, etc.). Crestfallen, Ananda retires to seclusion while Kasyapa convenes the first council to compile the tripitaka. Applying himself, Ananda becomes an arhat and returns to the council to recite the canon for them.
In that context, it makes sense that Ananda doesn’t know what is happening and needs to be told by an arhat like Aniruddha. Aniruddha plays an interesting role (to me, a bit humorous) in the sutra, telling people about hidden things he can see with his deva eye, like stopping the laypeople from holding the funeral right away because the gods have other plans.