Dear all, the following example crashes using latest git on ubuntu 18.10 with an error: <Speicherzugriffsfehler (Speicherabzug geschrieben)> aka 'memory access violation' <hansl> clear set verbose off function bundle default_naiveFC_opts (const series y) # Set default values bundle self = null self.h = 10 # forecast horizon return self end function function bundle naiveFC (const series y, string which "Select method", bundle opts[null]) # Set up the bundle bundle self = default_naiveFC_opts(y) if exists(opts) # override defaults self = opts + self endif series self.y = y # call method if which=="meanf" self.fc = meanf(&self) # !!! fails with a crash !!! #self.fc = meanf2(&self) # works endif return self end function function matrix meanf2 (bundle *self) return ones(self.h, 1) .* mean(self.y) end function function void meanf (bundle *self) self.fc = ones(self.h, 1) .* mean(self.y) eval self.fc end function # Example open nysewk.gdt -q bundle b = naiveFC(close, "meanf") </hansl> Interestingly, when you replace calling meanf() by meanf2() it works, however. Best, Artur