[Bug]: Informed Multinomial with high number of MCMC samples results in NaN.

[janderuiter]

JASP Version

Others

Commit ID

-------- Application Info -------- JASP Version: JASP 0.95 (Apple Silicon) Build Branch: HEAD Build Date: Jul 15 2025 15:49:44 (Netherlands) Last Commit: 797163d0f583a21807c21de494997936b63b7843 -------- Basic Info -------- Operating System: macOS Sequoia (15.5) Product Version: 15.5 Kernel Type: darwin Kernel Version: 24.5.0 Architecture: arm64 Install Path: /Applications/JASP 2.app/Contents/MacOS Platfotm Name: cocoa System Local: en_US

JASP Module

Frequencies

What analysis are you seeing the problem on?

Informed Multinomial

What OS are you seeing the problem on?

macOS Silicon

Bug Description

If I increase the MCMC number of samples to 100,000 (from the default of 10,000) I get NaN results.

[135.csv](https://github.com/user-attachments/files/21237903/135.csv)

135.jasp.zip

Expected Behaviour

A meaningful number should have been shown.

Steps to Reproduce

1. Open the file 135.csv
2. Select Bayesian Informed Multinomial (in Frequencies)
3. Enter "count" as factor
4. Enter the model 1 = 3 = 5 > 2 = 4 = 6
5. Set MCMC sample size and max sample size for bridge sampling both to 100,000

Log (if any)

No response

More Debug Information

No response

Final Checklist

• I have included a screenshot showcasing the issue, if possible.
• I have included a JASP file (zipped) or data file that causes the crash/bug, if applicable.
• I have accurately described the bug, and steps to reproduce it.

[tomtomme]

Thx for the report.
please try our new version 0.95 https://jasp-stats.org/download/ - and let us know if this helps :)
you used an unstable 0.95 beta, see " JASP Version: JASP 0.95 (Apple Silicon) Build Branch: HEAD Build Date: Jul 15 2025 15:49:44 "

also make sure to update macOS to version 15.6
please reopen the issue if the problems persist.

[janderuiter]

I tried the new version 0.95 after upgrading to MacOS 15.6, and the problem persisted: following the same steps as reported in the original issue, I still get a NaN for the BF with sample sizes 100,000 (whereas it's 19.9 with sample sizes 10,000). I don't know how to reopen this issue. Could you do this for me? Thanks in advance, J.P. de Ruiter

…

On Fri, Aug 1, 2025 at 9:45 AM Thomas Langkamp ***@***.***> wrote: *tomtomme* left a comment (jasp-stats/jasp-issues#3527) <#3527 (comment)> Thx for the report. please try our new version 0.95 https://jasp-stats.org/download/ - and let us know if this helps :) you used an unstable 0.95 beta, see " JASP Version: JASP 0.95 (Apple Silicon) Build Branch: HEAD Build Date: Jul 15 2025 15:49:44 " also make sure to update macOS to version 15.6 please reopen the issue if the problems persist. — Reply to this email directly, view it on GitHub <#3527 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ADEIKDPL7AADSARQTBZJQOL3LNVOHAVCNFSM6AAAAACBSQHTPSVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZTCNBUGY2DONRVGE> . You are receiving this because you authored the thread.Message ID: ***@***.***>

[janderuiter]

BTW out of curiosity, did this bug disappear at your end on ARM64 Mac with the new version of MacOS / JASP? If so, I wonder if there are configuration differences between our macs.

…

On Sat, Aug 9, 2025 at 3:12 PM JP de Ruiter ***@***.***> wrote: I tried the new version 0.95 after upgrading to MacOS 15.6, and the problem persisted: following the same steps as reported in the original issue, I still get a NaN for the BF with sample sizes 100,000 (whereas it's 19.9 with sample sizes 10,000). I don't know how to reopen this issue. Could you do this for me? Thanks in advance, J.P. de Ruiter On Fri, Aug 1, 2025 at 9:45 AM Thomas Langkamp ***@***.***> wrote: > *tomtomme* left a comment (jasp-stats/jasp-issues#3527) > <#3527 (comment)> > > Thx for the report. > please try our new version 0.95 https://jasp-stats.org/download/ - and > let us know if this helps :) > you used an unstable 0.95 beta, see " JASP Version: JASP 0.95 (Apple > Silicon) Build Branch: HEAD Build Date: Jul 15 2025 15:49:44 " > > also make sure to update macOS to version 15.6 > please reopen the issue if the problems persist. > > — > Reply to this email directly, view it on GitHub > <#3527 (comment)>, > or unsubscribe > <https://github.com/notifications/unsubscribe-auth/ADEIKDPL7AADSARQTBZJQOL3LNVOHAVCNFSM6AAAAACBSQHTPSVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZTCNBUGY2DONRVGE> > . > You are receiving this because you authored the thread.Message ID: > ***@***.***> >

[tomtomme]

@janderuiter
for me the bug persists on linux flatpak - so it does not seem to be macOS specific

-------- Application Info --------
JASP Version: JASP 0.95.1
Build Branch: HEAD
Build Date: Sep 8 2025 13:32:53 (Netherlands)
Last Commit: 180d14c18d13c107ee7c16b0993ff7e1cc02680b

-------- Basic Info --------
Operating System: KDE Flatpak runtime
Product Version: 6.8
Kernel Type: linux
Kernel Version: 6.12.44-3-MANJARO
Architecture: x86_64
Install Path: /app/bin
Platfotm Name: wayland
System Local: de_DE

@FBartos
any idea on this one?