# Dynare error for Matlab\_R2024a

**URL:** <https://forum.dynare.org/t/dynare-error-for-matlab-r2024a/25955>\
**Category:** Installation and Setup\
**Created:** [18 June 2024 18:35 UTC](https://forum.dynare.org/t/dynare-error-for-matlab-r2024a/25955 "2024-06-18T18:35:44Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![t-razafindrabe](https://forum.dynare.org/letter_avatar_proxy/v4/letter/t/e56c9b/32.png) [@t-razafindrabe](https://forum.dynare.org/u/t-razafindrabe)\
**Post date:** [18 June 2024 18:35 UTC](https://forum.dynare.org/t/dynare-error-for-matlab-r2024a/25955/1 "2024-06-18T18:35:44Z")

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Hello,  
I have just installed Matlab\_R2024a. And when I try to run my .mod file with the version 6.0-arm64 of Dynare, I’ve got the following error message:  
_Unrecognized function or variable ‘num\_procs’._  
_Error in default\_option\_values (line 73)_  
_options\_.threads.kronecker.sparse\_hessian\_times\_B\_kronecker\_C = num\_procs;_

With Matlab\_R2023b, it worked perfectly. I’ve also installed and try the version 6.1-arm64 but I get the same error message. The configuration of my Mac is Apple M3 with macOS Sonoma 14.5.

Can someone help? Thanks in advance,  
Best regards,  
Tovonony

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**Author:** ![jpfeifer](https://forum.dynare.org/user_avatar/forum.dynare.org/jpfeifer/32/5044_2.png) [@jpfeifer](https://forum.dynare.org/u/jpfeifer)\
**Post date:** [18 June 2024 18:57 UTC](https://forum.dynare.org/t/dynare-error-for-matlab-r2024a/25955/2 "2024-06-18T18:57:10Z")

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Did you make sure the Matlab and Dynare version are consistent, e.g. both for Silicon?

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<div class="post-metadata">

**Author:** ![t-razafindrabe](https://forum.dynare.org/letter_avatar_proxy/v4/letter/t/e56c9b/32.png) [@t-razafindrabe](https://forum.dynare.org/u/t-razafindrabe)\
**Post date:** [18 June 2024 19:21 UTC](https://forum.dynare.org/t/dynare-error-for-matlab-r2024a/25955/3 "2024-06-18T19:21:05Z")

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Hi,  
Thanks for your prompt response !  
You’re right, the link for the update provided by the commercial team of Mathworks is for Intel. I’ve reinstalled the Matlab for Silicon and it works both for 6.0 and 6.1 versions of Dynare.  
Many thanks,  
Best regards,  
Tovonony