Dear all, the following script: #################### smpl 10 100 loop for i=1..5 ols d const p testuhat smpl +1 +1 endloop #################### returns as error #################### gretl version 1.5.1 Current session: 2006/08/03 15:18 ? smpl 10 100 Full data range: 2001/01/01 - 2004/04/05 (n = 171) Current sample: 2001/03/05 - 2002/11/25 (n = 91) ? loop for i=1..5 Sorry, this command is not available in loop mode Error executing script: halting #################### Is there any way to use testuhat in loops, or do i have to "rewrite" testuhat by my own in a function to check the normality of residuals? Greetings, Johannes Fichtinger.