afni.nimh.nih.gov

So I added the new environment variable AFNI_USE_ERROR_FILE

If you set this to NO, then 3dDeconvolve.err will not be created. You can do this on the command line, via

3dDeconvolve -DAFNI_USE_ERROR_FILE=NO ...

or in the shell script somewhere before the program runs, or in your ~/.afnirc file.

This change is in the GitHub source repository now, and will be compiled into binaries overnight. You can update your installation tomorrow (via @update.afni.binaries -d for example).