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st: RE: -icd9- crashes Stata


From   Joe Canner <jcanner1@jhmi.edu>
To   "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu>
Subject   st: RE: -icd9- crashes Stata
Date   Thu, 12 Dec 2013 16:43:26 +0000

Jeph,

When you say "causes Stata to crash" what exactly do you mean?  There's an error message?  Stata shuts down?  Stata seems to stop working?

In my experience -icd9- is very slow; I use it on data sets that are about same amount of memory but fewer observations (5-10m). Among other things, it does several sorts and a merge with the ICD9 code file.

Absent any other information I would try a -set trace on- and see where the crash is occurring.

Regards,
Joe Canner
Johns Hopkins University School of Medicine

-----Original Message-----
From: owner-statalist@hsphsun2.harvard.edu [mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of Jeph Herrin
Sent: Thursday, December 12, 2013 8:24 AM
To: statalist@hsphsun2.harvard.edu
Subject: st: -icd9- crashes Stata


All,

I have been trying to use the Stata command -icd9- to process a variable containing (yes) ICD9 codes. The same fragment of code ran correctly in the past, but now

  capture : icd9 dxcode, check gen(invalid)

causes Stata to crash every single time. The dataset is large (~60m obs,
5gb) but Stata has no problem eg merging or sorting the same dataset, so I don't see why that should be an issue. Any thoughts? Any alternatives? 
I do not often work with ICD9 codes.

-dxcode- is str7, if that matters.

thanks,
Jeph
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