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st: recursive program call -> system limits exceeded


From   "Sebastian F. Büchte" <sfbuechte@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   st: recursive program call -> system limits exceeded
Date   Thu, 1 Feb 2007 14:56:31 +0100

Dear Statalisters,

today I have been working on a little program that contains a recusive
call to itself. While doing so I was wondering whether there is any
practical limit. So I tried the following in a do-file

global callno=0
capture program drop recursive_test
program define recursive_test
    global callno=1+$callno
    di "Call no = $callno"
    recursive_test
end
recursive_test

and here is the ouput (slightly abbridged)




. global callno=0

. capture program drop recursive_test

. program define recursive_test
 1.      global callno=1+$callno
 2.      di "Call no = $callno"
 3.      recursive_test
 4. end

. recursive_test
Call no = 1
Call no = 2
Call no = 3
...
...
...
Call no = 60
Call no = 61
Call no = 62
Call no = 63
system limit exceeded - see manual
r(1000);

end of do-file
r(1000);

No more than 63 recursive calls...So, I checked the manual without
really knowing for what limit I should be looking for. Maybe someone
has an idea.

regards
Sebastian
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