On Tue, 18 Sep 2012, Logan Kelly wrote: What version of gretl are you running, on what platform? I'm not aware of any problem with declaring bundles in a loop. The following works fine here: <hansl> loop i=1..2 --quiet bundle bun$i bun$i["i"] = i endloop print bun1 print bun2 </hansl> This gives (slightly trimmed): bundle bun1: i = 1 bundle bun2: i = 2 There's no such object in gretl as an "array of bundles", as such, but you can create a bundle of bundles if you want. Allin Cottrell

On Tue, 18 Sep 2012, Logan Kelly wrote: OK, thanks, I see the issue -- and it's quite subtle. You can't redeclare an already-declared variable (although it's fine to assign it a new value, of course), so the above is not legit in a loop. The difference in the variant I posted is that the declaration uses the loop index (as a string) in naming the new variable ... loop i=<<whatever> bundle bun$i # do stuff endloop so gretl is clever enough to understand that this won't be the same declaration over and over, it will be declaring a new bundle each time round. That's what you have to do. Allin Cottrell