problem in executing "trapz" function in matlab. error relating refblas.dll

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ptcl
ptcl 2011-8-5
评论： Jörg 2025-7-30
Hi every one. i tried to numerically integrate a data using "trapz" utility in matlab. it ends up with caution message which reads "The specified module could not be found" with refblas.dll.
in matlab command window response is
"libmwblas: load error: refblas.dll Caught std::exception Exception message is: refblas.dll"
please help me to get out of this.

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回答（3 个）

brian lithgow
brian lithgow 2022-10-5
I have a similar problem--no refblas.dll
system is Matlab2021 running on parrallels under windows 11
searched disk and no such file exists--any solutions/suggestions?
Brian
Friedrich
Friedrich 2011-8-5
Hi,
This sounds like a missing dependency. Either the needed DLL does not exist on your system or it exists but has the wrong version. It’s a bit tricky to figure out why it won’t work. Which MATLAB are you using and on which operating system? I know that on windows Server 2008 there exists some issue with the blas libraries.
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ptcl
ptcl 2011-8-5
thanks for your response. for more clarity i add following information.
i am running matlab 7.10.0(R2010a) on windows XP service pack 3 version 2002.
i hope you better understand issue now and give me some suggestion
Friedrich
Friedrich 2011-8-5
Normally on XP there shouldnt be any problem with the BLAS libs. Do you have a BLAS_VERSION environment variable?

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Jörg
Jörg 2025-6-3
编辑：Jörg 2025-6-3
Have the same issue: Running a Matlab based application on an MacBook Pro M4, with Paralles 20 Business Edition, Windows 11. gives an REFBLAS.DLL missing error!?
The same application runs fine on my old Win10 Laptop with native Intel processer. I had a seach on the HDD for the missing REFBLAS.DLL but is not present on the old laptop! Sounds weird that this DLL is needed in an Virtual Machine? Could not find the REFBLAS.DLL on the web either - anyone found a solution?
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David Hinton
David Hinton 2025-6-23
Switching to another virtual machine software Vmware Fusion that supports Windows 10 ARM did not encounter this issue, and the software usage problem was resolved.
Jörg
Jörg 2025-7-30
I contacted the paralles support and they found the problem! The solution is very simple:
Uninstall the "MATLAB Compiler Runtime 7.16 (32-bit)" on Windows 11 by going to ‘Control Panel → Programs and Features’
Now everything is running smoothly! Hope this helps someone with the same issue!?

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