BCI Visualization

[Eli_GC]

Hello, I have a problem with the visualization window of the brain signals, because it suddenly dissapeared . I have tried to install the BCI2000 again and it never returned. I want to know what it´s happening with this window, this is the second time that it occures (the last time i deleted many files but it this time it doesn´t work again).

Thanks for your attention,

Eli

[mellinger]

Eli,

thank you for reporting this problem.

In order to get the window back, please perform the following steps:
1) Start BCI2000 in the configuration for which the problem occurs.
2) Load a parameter file for which the problem occurs.
3) Open the parameter configuration dialog, go to the "Visualize" tab, and make sure that "VisualizeSource" is checked.
4) Click "Set Config" and verify that the source display is still missing.
5) Quit BCI2000.
6) From the Windows start menu, choose "Run...", and enter "regedit". Locate the following key:

Code: Select all

HKEY_CURRENT_USER\Software\BCI2000\OPERATOR\VISUALIZATION\SRCD

7) Delete that key from the registry.
8) Repeat steps 1) to 4). The source display should appear at the top left of your primary monitor.

In case you need to delete the registry key, it would be quite helpful to know the source revision and build date of your BCI2000 installation ("Help->About" in the operator's menu), so I could try to reproduce the problem and fix it for future versions.

Also, if you cannot get the source display back by following the above instructions, please choose "View->Connection Info" from the operator's menu. Under "received", are the numbers for "messages" and "data" increasing?

HTH,
Juergen

[timo.veldt]

I've encountered the same problem. The fix provided worked for me but I was wondering if there is a risk of losing data when this happens? Just to make sure.

[mellinger]

As far as I can tell, there is no risk of losing data associated with the erroneous behavior of the signal source display. It is most likely due to switching screen resolutions between BCI2000 sessions, such that the previous position of the signal display is then outside the current screen. I'll add a check for this situation to the Operator module, so it should not occur in future versions any more.

--Juergen

[mellinger]

BCI2000 now no longer stores its settings in the registry. Rather, it uses ini files that are located in the same directory as the executable in question, and bear the same name, just with an .ini extension. So, to fix window position, open the file /prog/Operator.ini in a text editor, and remove the line that has "SRCD" as a key. You may also just delete the ini file if you don't mind readjusting windows and other settings in the operator module.