Hi, sorry again but I did not find any info on this issue in the standard documentation. While playing around with gretl I tried the x-12-arima analyses. It seems correctly installed since I can use it from the shell (also I followed suggestions in a previous message in this list). However, inside gretl I do get the x12arima pop-up but also an error add_series_from_file() failed Where should I look in order to solve this problem? Is it concerned with the .spc file needed with x12a? Or something else? Hope not to bother the list too much today. Angelo -- ======================================================== Angelo Secchi PGP Key ID:EA280337 ========================================================