Howdy-
Indeed, that message in the program should be updated to something more useful...
I believe 3dTcorr1D is the program you are after:
Usage: 3dTcorr1D [options] xset y1D
Computes the correlation coefficient between each voxel time series
in the input 3D+time dataset 'xset' and each column in the 1D time
series file 'y1D', and stores the output values in a new dataset.
[
afni.nimh.nih.gov]
If you have the single waveform as a row and not a column in a text file FILE.1D, you can transpose it and store the results in a file called FILE_T.1D with the following:
1dcat FILE.1D\' > FILE_T.1D
Also, for finding programs in AFNI, certainly asking on the MB is good, as done here, but this list of programs by approx. classification might also help:
[
afni.nimh.nih.gov]
--pt
