Summary:

Right now we have a very ad hoc approach to figure out the names for multiple chains. For a users id and the number of chains they have requested we just append _1..{num_chains} to the end of the file name for output. For inits we look if the user gave us a file ending with _id. and if so we search for num_chain arguments ending in _1...{num_chains}.

We chose this scheme at the time because I was calling cmdstan myself from the terminal and it was a clever shorthand so I didn't have to write out a bunch of file names.

But with the number of upstream packages calling Stan it might be easier for them to programatically generate the names of the files they want and pass a comma separated list of file names.

Additional Information:

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Current Version:

v2.34.1