Hi Francois
The idea is I want to simulate just one dipole with specific location and then solve the forward model to plot its corresponding topoplot,
What I did
I chosed a scout and exported to Matlab (from the Scout tab: menu Scouts > Export) so I have a specific vertices for example that correspond to sematosensory region, I simulate from the scout, I compute the source model, I export the source structure to matlab, I modified the imagegrid map by putting ecery thing is zero except the vertics I get it from the scout, then I imported again, I did model evaluate--simulate recording then I visulaise the topoplot it seems working,
but the idea is when I put another channel and its corresponding leadfield then repeat the same as I mentioned before, I get the exactly the same topoplot which should be different,