Haven't seen this before. Can you send the lta file (should be in basid/MRI/transforms)
Probably the lta is not correct.
Also you can try to delete the base dir and rerun, maybe it was just a hiccup.

Does the norm.mgz look good in the base? If not registration did not work.
In that case download updated mri_robust_register and ...template (links on the wiki on the 5.0 release notes) and run again.

Best Martin

On 28.10.2010, at 20:24, Guang Zeng <freesurfer_zg@hotmail.com> wrote:

Hi, there,

%% 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
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