What type of error is here with forward solution?

[abdallahqusaibe]

@Francois

the cortex surface without smoothing + the inner skull in red

it seems that there is no point of the cortex that seems outside the inner skull.

@Francois

Right-click on the forward model > View leadfield vectors.

@Francois

Right-click on the cortex you've be estimating the leadfield for > Force inside skull.