Hello, Updates to the core libraries can cause this problems with some version of FSL - can you update to the latest version ( 5.0.9 ) and re-run? Kind Regards Matthew > Hello, > I am processing my first dataset from Skyra (sofar Avanto only) in Feat and I came across this strange error. I run the analysis on the grid, single machine or my notebook - all FSL 5.0 - and I constantly get no output in poststats and my log/feat2_pre says: > > /usr/share/fsl/5.0/bin/epi_reg --epi=example_func --t1=highres_head --t1brain=highres --out=example_func2highres > terminate called after throwing an instance of 'NEWMAT::SingularException' > > example_func2highres is not created > > example_func2highres_init.mat looks strange as well, containing this: > > 0x1.ff841146c0caap-1 0x1.4259e4912cc1ap-5 0x1.2eda806de276bp-6 0x1.9e68c08b668a8p+4 > -0x1.c581fac60fb06p-6 0x1.cea3ad4b7234bp-1 -0x1.b5c1fb58352dap-2 0x1.91eef7b2dc123p+5 > -0x1.12a1eccb6387ap-5 0x1.b4d1e87ec1528p-2 0x1.cec273391a326p-1 -0x1.b4e53c839e968p+3 > 0x0p+0 0x0p+0 0x0p+0 0x1p+0 > > Or other data which is some mix of decimal and hex. > > I use high-res T1, not fieldmap. Any clues ? > > > Thanks > George