NLfit Error

Dear AFNI experts,

I am trying to run NLFit through the afni gui (define datamode – > plugins). I am using X11 Quartz (latest version) and running the latest version of afni through a mac.

I am getting the following error when i click Tran1D–>NLFit (on the graphs window).

Matrix error: Incompatible dimensions for vector multiplication-subtraction

I have a friend running the same function through Linux and not having a problem.

I was wondering, is it there a known bug in NLFit that is endemic to X11 Quartz? If so, is there a fix?

Thank you,