Example Bernoulli not working under Julia 1.7.1

[pkroenert]

Dear Mr. Goedman,

It seems that the current example bernoulli.jl is not working under Julia Version 1.7.1.

The error message in the log-file is:

num_chains=1 is either mistyped or misplaced. Failed to parse arguments, terminating Stan

Best regards, Philipp

[goedman]

Hi Philip,

Looks like this is part of a message coming from cmdstan itself. I expect (but can’t be 100% sure) that you might be using mismatched versions of StanSample.jl and the cmdstan executable.

Which version of StanSample are you using? StanSample v6 (currently v6.3.0) expects cmdstan-2.28.0+ (currently cmdstan-2.29.0 is the released version of Stan).

Do you mind checking which versions you have installed. With the introduction of support for C++ level threads in cmdstan-2.28.x and up I needed to make several updates to to StanSample.jl.

Best, Rob

Rob J Goedman @.***

On Feb 22, 2022, at 03:40, PToTheK @.***> wrote:

Dear Mr. Goedman,

It seems that the current example bernoulli.jl is not working under Julia Version 1.7.1.

The error message in the log-file is:

num_chains=1 is either mistyped or misplaced. Failed to parse arguments, terminating Stan

Best regards, Philipp

— Reply to this email directly, view it on GitHub https://github.com/StanJulia/StanSample.jl/issues/49, or unsubscribe https://github.com/notifications/unsubscribe-auth/AAAMX2BRXSKGQKOVTDH5LM3U4NRZZANCNFSM5PA7MPLA. You are receiving this because you are subscribed to this thread.

[pkroenert]

Hi Rob,

Very good guess! I use the newest version StanSample StanSample v6.3.0, but It seems I am using still cmdstan-2.26.1.

I will load the new version and report asap if that resolved the issue.

Thank you very much, for your qualified response.

[goedman]

Hi PToTheK,

Github remains down for me, so I’m using the mail side.

Simultaneously I’m helping someone else and I’m wondering if I can create a StanSample version that does not insert the num_chains=1 argument if using Julia level “threads” (spawning a process for each chain). If that would work on cmdstan versions < cmdstan-2.28.0 it might help many folks make the transition to newer versions. At least temporarily as the Stan Language itself is also changing a bit.

Best, Rob

Rob J Goedman @.***

On Feb 22, 2022, at 08:51, PToTheK @.***> wrote:

Hi Rob,

Very good guess! I use the newest version StanSample StanSample v6.3.0, but It seems I am using still cmdstan-2.26.1`.

I will load the new version and report asap if that resolved the issue.

Thank you very much, for your qualified response.

— Reply to this email directly, view it on GitHub https://github.com/StanJulia/StanSample.jl/issues/49#issuecomment-1047935913, or unsubscribe https://github.com/notifications/unsubscribe-auth/AAAMX2BWSA6AEJ3GKYAQL6TU4OWGJANCNFSM5PA7MPLA. You are receiving this because you commented.

[goedman]

Hi @PToTheK ,

A new version of StanSample.jl (v6.3.1) just got merged which I believe will, by default, be compatible with older versions of the cmdstan as long as the keyword argument use_cpp_chains=false (in the stan_sample() call). That is the default and multiple chains will execute on Julia level ( a process for each chain).

[pkroenert]

Hi @goedman,

I loaded cmdstan-2.29.0 and StanSample v6.3.0 works correctly now!

"A new version of StanSample.jl (v6.3.1)..."

That sounds good! Indeed, this will make the transition for many users much smoother.

Thank you very much!

[goedman]

Great, thanks for the update Philipp.