Has anyone ever used Ωnyx for SEM ?

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Can someone point me towards tight bounds for the cumulative distribution of a multinomial ?

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D. Eastern Kang Sim

Onyx has not been updated for awhile.

I used to use Onyx just to extract code generated, and then use that as a backbone and make modification to run in lavaan or openmx in R.

I personally prefer openmx over lavaan.

If you have a funding to purchase AMOS, I would encourage you to consider Mplus. It is the king of SEM, and widely recognized by journals.