Hello AFNI crew,

I am running PPI analysis via Gang's Context-Dependent Correlation Analysis instructions. I've used this pipeline before and haven't run into issues; however, this time around 1dUpsample outputs
"** FATAL ERROR: 1dUpsample can't read file '1797555712' " after running these commands:

3dmaskave -quiet -mask $roi/${seed}.nii B_baseline_DETREND+tlrc > ${seed}_AVE.1D
1dUpsample ${xx} ${seed}_AVE.1D\' > ${seed}_TRANS.1D

I assumed this was a transposition issue, so I added 1dtranspose:

3dmaskave -quiet -mask $roi/${seed}.nii B_baseline_DETREND+tlrc > ${seed}_AVE.1D
1dtranspose ${seed}_AVE.1D ${seed}_UPSAMPLE.1D
1dUpsample ${xx} ${seed}_UPSAMPLE.1D > ${seed}_TRANS.1D

...but these commands produced "** FATAL ERROR: 1dUpsample doesn't like file '-108684202'"

The input to 1dUpsample is a 1D text file with a single column of values that does exist within the working directory. Any help with this snag is much appreciated!

Thanks!