Hello AFNI gurus,

After running most of my pre-processing script, I get to the point where I want to compute de-meaned motion parameters for my regression by writing this line:

1d_tool.py -infile dfile.rall.1D -set_nruns 6 -demean -write motion_demean.1D

With this I get the following error in my terminal: ** nvalid nruns = 6 (does not divide nt = 1469)

This study has 6 functional runs. The TRs for each run are different ( 171 168 259 321 323 257 ) and I previously had the script written to remove the first 5 TRs across each run.

I made a single file of registration params in a previous step by executing this line:
cat dfile.r??.1D > dfile.rall.1D

This script has been run successfully on a few subjects, without this nvalid issue, although the timings do differ between subjects.

Any ideas how to solve this nvalid nruns problem?

Many thanks for your help,

AL