Xdf import issue

[mglassen]

Description

I’m running into a problem with some xdf files I’m recording with lab recorder. I am using eeglab in matlab to load them. I have 1 or 2 event streams coming in and 1 eeg data stream. Some of the files load properly, while others are giving this error at

line 542: Array indices must be positive integers or logical values

It’s looking for a min at this line and using it to index into remaining_indices, but the index in this case is coming to zero.

I think it’s happening because ranges has 2 cells, and the first is only [1 1], the 2nd is [2 185]. So on line 532 cur_end_time==0, this means I have a data segment of length 0 I think? Could this be caused by one of my event streams having no events present?

I have a few datasets that are presenting this error, so any help is greatly appreciated! If you would like one of the files I can send one.

Just some more info, I checked the temp variable in load_xdf on one of the erroring datasets, and temp(1) is a trigger stream with no time series/time_stamps, could this be the issue?

#### Steps to Reproduce

1. File-import data-from xdf file

#### Expected behavior File loads in
#### Actual behavior: Eeglab error in load_xdf() 542 Array indices must be positive integers or logical values

Link to dataset:

https://drive.google.com/file/d/1rc_ED3GD9DWYqRH0TUC3UC9Ni0uL65WR/view?usp=drivesdk

#### Versions

OS version	windows 11
Matlab version	2024b
EEGLAB version	eeglab2023
Xdfimport1.2

I had to make an edit to pop_loadxdf on line 73, as load_xdf expects filepath and filename together as 1 string, but they were being supplied as 2 seperate arguments. I dont believe this has anything to do with the error, as I am able to load in 9 out of the 12 xdf files I have without issue, just 3 of the files have this same error

[giovanniconstantin]

I have almost the same problem. I use the latest version of EEGLAB, and I cannot import xdf files through the XDF Importer plugin. When I try to import the file, the following message appears: The file "subP001.xdf" does not exist., This is not a bug (error occurred in function load_xdf() at line 213). I use Matlab 2025a, and when I downloaded the latest version of EEGLAB, I deleted all the plugin files from the folder and downloaded them again. Using the previous version of the program didn't have any problems.
Is there anything I can do?

[mglassen]

I have almost the same problem. I use the latest version of EEGLAB, and I cannot import xdf files through the XDF Importer plugin. When I try to import the file, the following message appears: The file "subP001.xdf" does not exist., This is not a bug (error occurred in function load_xdf() at line 213). I use Matlab 2025a, and when I downloaded the latest version of EEGLAB, I deleted all the plugin files from the folder and downloaded them again. Using the previous version of the program didn't have any problems. Is there anything I can do?

I had the same problem, check the last paragraph of my bug report above for the fix for that!

[giovanniconstantin]

I have almost the same problem. I use the latest version of EEGLAB, and I cannot import xdf files through the XDF Importer plugin. When I try to import the file, the following message appears: The file "subP001.xdf" does not exist., This is not a bug (error occurred in function load_xdf() at line 213). I use Matlab 2025a, and when I downloaded the latest version of EEGLAB, I deleted all the plugin files from the folder and downloaded them again. Using the previous version of the program didn't have any problems. Is there anything I can do?

I had the same problem, check the last paragraph of my bug report above for the fix for that!

Do you mean that?
"I had to make an edit to pop_loadxdf on line 73, as load_xdf expects filepath and filename together as 1 string, but they were being supplied as 2 seperate arguments. I dont believe this has anything to do with the error, as I am able to load in 9 out of the 12 xdf files I have without issue, just 3 of the files have this same error"

[mglassen]

Yes exactly, if you put a break point at line 73 in that script, you’ll see pop_loadxdf is giving the filepath and file name as 2 arguments to load_xdf, but load_xdf expects them as 1 combined string. So if you just join the filepath and filename as a full path and supply it to load_xdf as 1 string argument that should fix your issue. My issue seems to be a bit more complicated and I couldn’t figure it out unfortunately On Mar 11, 2026, at 1:24 PM, giovanniconstantin ***@***.***> wrote:giovanniconstantin left a comment (sccn/eeglab#920) I have almost the same problem. I use the latest version of EEGLAB, and I cannot import xdf files through the XDF Importer plugin. When I try to import the file, the following message appears: The file "subP001.xdf" does not exist., This is not a bug (error occurred in function load_xdf() at line 213). I use Matlab 2025a, and when I downloaded the latest version of EEGLAB, I deleted all the plugin files from the folder and downloaded them again. Using the previous version of the program didn't have any problems. Is there anything I can do? I had the same problem, check the last paragraph of my bug report above for the fix for that! Do you mean that? "I had to make an edit to pop_loadxdf on line 73, as load_xdf expects filepath and filename together as 1 string, but they were being supplied as 2 seperate arguments. I dont believe this has anything to do with the error, as I am able to load in 9 out of the 12 xdf files I have without issue, just 3 of the files have this same error" —Reply to this email directly, view it on GitHub, or unsubscribe.You are receiving this because you authored the thread.Message ID: ***@***.***>

[arnodelorme]

Looks like the file is truncated. Note: this bug can be assigned to AI to check the possible implications of changing the indices, and I have saved the data file just in case.