Re: st: Re: aorder: system limit exceeded

[Richard Williams <Richard.A.Williams.5@ND.edu>]

At 05:34 PM 7/1/2005 +1000, James Muller wrote:
> All right, I'm not checking that code. There are just 2 comments and one 
> of them is wrong (just copied from the first).
Stata's lack of comments has been commented on before.  My own theory is 
that is a form of job security for Stata programmers.  :) But, when I 
forced myself to work through mlogit_p.ado so I could adapt it for 
-gologit2-, I found that it was logical and pretty clever and had a few 
critical comments that saved me from getting lost.  I tend to put lots of 
comments in my programs (and am glad I do when I go back to them years 
later) but whether anybody besides me would understand them, I don't know.


> I'd suspect you're on the right track though;  the algorithm is obviously 
> falling into an infinite recursion. Sorts usually work by mapping an array 
> to itself over and again a set number of times, and I'd suspect that the 
> mapping is somehow either generating duplicate variable names (in the 
> abstract representation of the variable name list) or a pair of variable 
> names is being swapped back and forward over and over until infinity.
I think you are right. With trace on the log file is enormous and keeps 
saying the same thing over and over.  I'm not sure what system limit is 
being reached (depth of recursive calls?) but if you upped it I bet you'd 
get the same error in the end.

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Richard Williams, Notre Dame Dept of Sociology
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