Why are you converting from NIfTI to AFNI? AFNI handles the
NIfTI files quite well.

If you choose to convert, I'd use 3dCopy directly on the NIfTI file.

Under no circumstances should you convert it to ANALYZE, since
at BEST that's just throwing away good information...

Did you try using 3dcopy directly? That shouldn't give you
floats. If it does, I'll track down the problem. A few things
might cause that in a multi-volume file, such as different
scaling factors in different volumes.

If you'll upload the file to our server using the instructions
at the message board, I'll take a look at it.

rich