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st: Cox Regression - flat region resulting in a missing likelihood


From   T Andorfer <andorfer.tm@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   st: Cox Regression - flat region resulting in a missing likelihood
Date   Mon, 29 Apr 2013 20:16:47 +0200

Dear all,
I set my data stset and then I tried to run a stcox and got the following
error message " flat region resulting in a missing likelihood r(430)";

There should be reasonable variation in my depended variable, which is
the time measure in months until death and my data is
non- censored, meaning every observation unit experienced the "event".

I would be greatful for some input.

Thank you in advance,

Best Theresa
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