Hi, I have encountered a strange bug in gretl 1.6.0: After estimating an equation Y = a + b*X and trying to add a new variable Yhat = $coeff(const) + $coeff(X)*X, the $coeff(var) command is not working anymore (as is not, for example, $rsq and $aic either). However, this same commands worked without any problems a couple of weeks ago, and works fine with the Windows "snapshot" on http://ricardo.ecn.wfu.edu/pub/gretl/gretl_install.exe Regards Andreas