"DLL load failed" error when importing MATLAB Engine in ArcPy

Dear All,

I am trying to integrate a matlab code in ArcGIS Pro . My MATLAB version is 2023a.

I guess there is a confilct of the DLL library between its location in ArcGIS Pro and Matlab.

I could import matlab and matlab.engine from Spyder but I could not do it from ArcGIS Pro.

From ArcGIS Pro I am able to import matlab but not matlab.engine.

The exact error message is: DLL load failed while importing matlabengineforpython3-9. The specified procedure could not be found.

The problem is that I do not know where are the tbb.dll and tbbmalloc.dll files that I should rename them in ArcGIS system. I am afraid to mess with the wrong files.

Any help would be appreciated!

Thanks a lot

Answer 1

[Ruchika]

Hi, it seems like you are encountering an issue with importing the `matlab.engine` module in ArcGIS Pro due to a DLL conflict. To resolve this, you can try the following steps:

1. Locate the `tbb.dll` and `tbbmalloc.dll` files in your MATLAB installation directory. These files are typically located in the `bin` folder of your MATLAB installation, such as `C:\Program Files\MATLAB\R2023a\bin`.

2. Once you have found the `tbb.dll` and `tbbmalloc.dll` files, make a backup of these files by copying them to a safe location on your computer.

3. In the ArcGIS Pro installation directory, navigate to the `bin` folder. This is typically located in `C:\Program Files\ArcGIS\Pro\bin`.

4. Look for any existing `tbb.dll` and `tbbmalloc.dll` files in the ArcGIS Pro `bin` folder. If you find any, make a backup of these files by copying them to a different location.

5. Now, copy the `tbb.dll` and `tbbmalloc.dll` files from your MATLAB installation directory (step 1) into the ArcGIS Pro `bin` folder (step 3).

6. Restart ArcGIS Pro and try importing `matlab.engine` again. Hopefully, this should resolve the DLL conflict and allow you to import the module successfully.

Please note that modifying system files can have unintended consequences, so it's always a good idea to make backups before making any changes.