Error 127 Details: Unable to load bundle binary C:\Program Files\MATL​AB\R2020b\​bin\win64\​builtins\m​atlab_tool​box_genera​l_builtins​\mwwkspint​rospect_bu​iltinimpl.​dll

I have compiled a python package for a matlab function. But when i run the same by initializing the mcr instance in python i get the error below. I suspect that the startup.m script is not being called and hence Matlab is not able to find the .dll file. How can this be fixed ?

I get this error while executing the matlab function from a flask app. But it runs without any errors when executed through a standalone python script or through the interpreter.

PS: I have a feeling that if i somehow call startup.m in my main function then it should solve the problem.

File "C:\Program Files\MATLAB\R2020b\toolbox\compiler_sdk\pysdk_py\matlab_pysdk\runtime\deployablefunc.py", line 80, in __call__
    nlhsWasSpecified, stdoutObj, stderrObj).result()
  File "C:\Program Files\MATLAB\R2020b\toolbox\compiler_sdk\pysdk_py\matlab_pysdk\runtime\futureresult.py", line 135, in result
    raise e
  File "C:\Program Files\MATLAB\R2020b\toolbox\compiler_sdk\pysdk_py\matlab_pysdk\runtime\futureresult.py", line 123, in result
    raise e
  File "C:\Program Files\MATLAB\R2020b\toolbox\compiler_sdk\pysdk_py\matlab_pysdk\runtime\futureresult.py", line 113, in result
    self._nlhs, out=self._out, err=self._err)
matlab_pysdk.runtime.MatlabRuntimeError: An error occurred when evaluating the result from a function. Details: Unable to load bundle binary C:\Program Files\MATLAB\R2020b\bin\win64\builtins\matlab_toolbox_general_builtins\mwwkspint
rospect_builtinimpl.dll. Error: 127: state not recoverable

Answer 1

[Priysha LNU]

This issue is potentially caused by spaces in the Windows "%temp%" directory path. Once your Windows "%temp%" directory path does not have a space, the script should be able to execute without error. Spaces in the Windows "%temp%" directory may be caused by spaces in the Windows username.

Here "C:\Program Files\" seems to contain a space character. Changing to a directory without the "space character" in the path might help resolve this issue.

This is a known issue and you can find a workaround in the following bug report:

• https://www.mathworks.com/support/bugreports/2334389

DISCLAIMER: These are my own views and in no way depict those of MathWorks.

[Mehul Garg]

Hi Priyashi,

Thank you for looking into the problem and replying back. So after reading your suggestion, i changed the installation directory of my MATLAB program from "C:\Program Files\MATLAB" to C:\ MATLAB and changed the corresponding system path variables.I also re-installed my python MATLAB API engine library.

This solved the problem for me!

Mehul Garg

PS: I simply moved the MATLAB files from one directory to another.

PPS: This seems to be an issue that MATLAB should be able to fix internally. It delayed the process of deploying the web app by a good amount of time.

[Brian Andersen]

And where are these corresponding variables?

[Shriram TG]

you can edit environment variables by searching 'Edit the environment Variables' in windows 10 -> advanced -> system variables

[Bruno]

I'm getting the same error, but in a different situation. I don't have a flask application, but depending on which packages I use in Python, I get the same error as the OP. Very weird. And yes, it's not acceptable that MATLAB (still) has issues with white spaces in the path. Uninstalling and reinstalling a big software like MATLAB isn't always an easy task when IT is in the picture. And that becomes a requirement for deployment (user shall not install MATLAB in a path with white spaces).

[Bruno]

Quick update. After reinstalling MATLAB, I'm still getting the same error. I created a Python Package using the compiler library, which I then import in the Python code. I first call initialize() and then I call the main function in the package. And that's when the error occurs. All relevant paths have no white spaces.

Caught "std::exception" Exception message is:
Unable to load bundle binary C:\MATLAB\R2020b\bin\win64\builtins\matlab_toolbox_general_builtins\mwwkspintrospect_builtinimpl.dll. Error: 127: state not recoverable
Traceback (most recent call last):
  ...
  File "C:\MATLAB\R2020b\toolbox\compiler_sdk\pysdk_py\matlab_pysdk\runtime\deployablefunc.py", line 79, in __call__
    ret = futureresult.FutureResult(self._cppext_handle, future_tuple, nlhs, 
  File "C:\MATLAB\R2020b\toolbox\compiler_sdk\pysdk_py\matlab_pysdk\runtime\futureresult.py", line 135, in result
    raise e
  File "C:\MATLAB\R2020b\toolbox\compiler_sdk\pysdk_py\matlab_pysdk\runtime\futureresult.py", line 123, in result
    raise e
  File "C:\MATLAB\R2020b\toolbox\compiler_sdk\pysdk_py\matlab_pysdk\runtime\futureresult.py", line 112, in result
    self._result = self._cppext_handle.getFEvalResult(self._future_tuple, 
matlab_pysdk.runtime.MatlabRuntimeError: An error occurred when evaluating the result from a function. Details: Unable to load bundle binary C:\MATLAB\R2020b\bin\win64\builtins\matlab_toolbox_general_builtins\mwwkspintrospect_builtinimpl.dll. Error: 127: state not recoverable

This error happens when using Fedot (https://github.com/nccr-itmo/FEDOT). Not sure what the problem is.

[Bruno]

After a lot of debugging, I realized that the "std::exception" happens when I call fileread in the MALTAB function. And it makes no sense because everything works fine if I use an AutoML framework other than Fedot. if I instantiate class Fedot after running the MATLAB function, then it works fine. And that's the "fix" to my problem. I can't instantiate Fedot before calling the MATLAB function. Very weird.

[Bruno]

I now suspect it may have to do with Tensorflow. Whenever it is imported in Python, I get the following warnings:

2021-08-12 14:52:01.983359: W tensorflow/stream_executor/platform/default/dso_loader.cc:64] Could not load dynamic library 'cudart64_110.dll'; dlerror: cudart64_110.dll not found
2021-08-12 14:52:01.983479: I tensorflow/stream_executor/cuda/cudart_stub.cc:29] Ignore above cudart dlerror if you do not have a GPU set up on your machine.

And if that happens before I call the MATLAB function, I get the same error. So the "solution" now seems to first call the MATLAB function and then import anything related to Tensorflow. There's some interference going on.

[Antony Smith]

If this is an issue with the space in "Program Files" then that is clearly a major bug in the installation of Matlab.

A while back I had this issues and it took me days to figure out the cause was the space in my User Account name. To solve it I had to create a new User Account with a single word name.

Now I have gotten a new laptop and installed Matlab on the single named user account, which ran fine at first. After several hours of installing all of the required Add-Ons and libraries, I switch my laptop on today and when trying to create new Simulink file, I am getting the Error:

Failed to load bundle #441: C:\Program Files\MATLAB\R2022b\bin\win64\dastudio.dll

I REALLY do not want to uninstall and go through all of this again.

How can Matlab overlook something as obvious as a SPACE character in the file recall system. Especially when it is the one that chose the installtion path of "C:/Program Files"???

Has nobody figured out a quicker work around for this sissue?

[Gary]

reinstall all the matlab with path without space， still not Ok. Error still.......

[weiliang]

i have no idea......

Answer 2

[Mohammad]

how can matlab overlook this problem? i still face similar issue with no solution