%% After running this command with FS v4.5 :
recon-all -base 005_S_0221BASE -tp 005_S_0221_45_20070321.105506_1 -tp 005_S_0221v2_45_20061006.104318_1 -all -force

%% I get the following error:

mri_concatenate_lta -invert1 005_S_0221_45_20070321.105506_1_to_005_S_0221BASE.lta identity.nofile 005_S_0221BASE_to_005_S_0221_45_20070321.105506_1.lta

invert the first LTA before applying it
MatrixInverse: NULL input matrix!

Read individual LTAs
%%%%%%%%%%

Any one can help me?

Thanks a lot!

uang