EDF+ Annotations Not Imported & mexSLOAD Broken

[contsili]

Environment

• EEGLAB Version: 2025.1.0
• Biosig Plugin: 3.8.4
• MATLAB: R2024a
• OS: Windows 11

First Try: Loading EDF File with Default Settings

I'm trying to load an EDF+ file that has annotations/events using File > Import Data > Using EEGLAB functions and plugins > From EDF/EDF+/GDF files (Biosig toolbox)

Result: The file loads but creates 0 events even though the file has 2 annotations.

Trying mexSLOAD Option

I tried using mexSLOAD, so I checked the "Import using alternative BIOSIG method (mexSLOAD)" option.

Result: Error message

Error: Invalid MEX-file '...\eeglab2025.1.0\plugins\Biosig3.8.4\biosig\t200_FileAccess\mexSLOAD.mexw64': 
The specified module could not be found.

However, the mexSLOAD file exists in the plugin:

>> which('mexSLOAD')
ans = 'C:\...\plugins\Biosig3.8.4\biosig\t200_FileAccess\mexSLOAD.mexw64'

Expected Behavior

In MNE Python, I can open the same file and it correctly shows the 2 events/annotations I expect:

What Should Be Fixed?

I'm not sure what the correct solution is:

1. Should mexSLOAD be fixed?

2. Is there a workaround?

   • Is there another way to import these annotations? This is for one of our customers and they do not want to use scripting but ideally only the GUI

Note:
The Biosig edfannot2evt() function exists and when called manually it does extract the 2 annotations correctly, but it seems this function is never called during normal import through pop_biosig(). Seems to be disabled in this commit: EEGKit/biosig-clone-240305@3017e2e

Test File

https://drive.google.com/file/d/18iMnNWznjAEdjl8OqbqMO3Knu1GYdyWK/view?usp=sharing

Thanks!