Error using view_headpoints

[dsrishyla]

Hello,

We are using a Polhemus fastrak digitizer with Brainstorm binary version downloaded from here: We are using MATLAB Runtime R2022B (9.13).

I am not able to collect RPA and generate the headpoints figure. This is the error message that was generated:

Error using view_headpoints

No scalp surface available for this suject.

Error in panel_digitize>CreateHeadpointsFigure (line 957)

Error in panel_digitize>BytesAvailable_Callback (line 1538)

Error in instrcb (line 42)

Warning: The BytesAvailableFcn is being disabled. To enable the callback property

either connect to the hardware with FOPEN or set the BytesAvailableFcn property.

> In bst_startup (line 759)

In brainstorm (line 123)

Based on other threads reporting the same problem, I tried the following:

• Disconnect one of our two monitors and re-run it. However, the issue persists.
• Right click on the subject folder in the database explorer à Edit subject à (you suggested the option ‘Yes, use protocol’s default anatomy’. But this option is greyed out for me.)

Do you have other suggestions?

Link to the other threads:

Problems with digitizing anatomical fiducials in Brainstorm (using Polhemus Fastrak)

Dear all, We are using Brainstorm in combination with the Polhemus Fastrak to digitize EEG electrode positions (BioSemi, Active, 64 electrodes). Most of the time it works really great! But sometimes we can’t digitize the last anatomical fiducial (i.e., RPA) and then everything is/looks wrong. We register the anatomical fiducials twice and it’s usually the second time that it doesn’t work. We’re not sure what we’re doing wrong. We have tried to modify the set-up several times to ensure that the…

Error using view head points

I am using brainstorm (15.06.15 version) on MATLAB 2012 (64 bt version), to digitize electrode positions with the EEG montage: GSN-hydrocel-129, fastrak, polhemus. At the second click to the right fiducial the following error message occurs, instead of the head shape, and digitization cannot continue: Error using view_headpoints (line 52) No scalp surface available for this suject. Error in panel_digitize>CreateHeadpointsFigure (line 955) [hFig, iDS] = view_headpoints(file_fullpath(sStudy.…

Thanks for your time,

Diksha

[Marc.Lalancette]

Hello,

I suspect this has to do with using the compiled version and/or not having a template to use as default anatomy. I think it's supposed to download it automatically if it's not present. Does that computer have an internet connection? Are you able to download and install a default anatomy from within Brainstorm (right click "default anatomy" > "use template" > and select one, e.g. ICBM 2023), or manually?

Otherwise, is this repeatable, I mean trying again with a new subject name not already in the database?

Marc

[dsrishyla]

Hi Marc,
Thanks for your guidance. It is an offline computer, so I downloaded the zip file of an anatomy template from the Brainstorm download page and transferred it to the 'defaults->anatomy' folder on the computer. Now it is working
Appreciate your time.

Best,
Diksha