Hi Daniel,

No problem at all. By inline inverse warp, do you mean 3dNwarpApply with -nwarp as shown in the help ??

-iwarp = After the warp specified in '-nwarp' is computed,
invert it. If the input warp would take a dataset
from space A to B, then the inverted warp will do
the reverse.
++ The combination "-iwarp -nwarp 'A B C'" is equivalent
to "-nwarp 'INV(C) INV(B) INV(A)'" -- that is, inverting
each warp/matrix in the list *and* reversing their order.
++ The '-iwarp' option is provided for convenience, and
may prove to be very slow for time-dependent '-nwarp' inputs.

In that sense, I guess my correspondence between letters and warps would be

A (-warp1): T1Div_brain_uni_AQ_WARP+tlrc
B (-warp2): T1Div_brain_uni_A.aff12.1D
C (-warp3): mat_PrestofRegDTRCRRVTcor_2T1uni.aff12.1D

Is that right?

Thanks very much,
Cesar