Some background: I am doing an analysis on MEG data. I used the default anatomy for my subjects and warped the anatomy for each of them. I want to look at the cortex surface as well as the deeper structures, so I decided to create both a surface model and a volume model separately. I did the surface model first.
After I had my surface model, I created a Group analysis source grid to be able to average across recordings for volume models, as described in this topic: Error message creating a volume source grid. As described in this topic, I first of all wonder if the source grid was created correctly. After an initial discussion I carried on, and since the location of the sources in my models seemed okay, I proceeded with my analysis.
I did not define scouts yet for both the surface and volume analysis. I am still excluding some recordings based on the activation I see on my surface source estimation model.
Now, if I open a surface sources model, I get the following message in my Matlab Command Window: "BST> Error: These scouts are defined on a volume grid, but the sources were calculated on a surface.". It states the error, but proceeds with opening the surface source model. The activity I see seems to be physiological.
Am I doing something wrong? I don't understand the error, as I did my surface source estimation before defining the group analysis source grid. Do I need to change anything, how can I avoid this error? And if I continue to create scouts further in my analysis, what this the best way?
Thanks in advance for helping,