R help - Oct 2007 - gee, error=104

I am using gee to fit a log-linear marginal model to grouped data. I 
get sensible results unfortunately followed by this warning

Warning message:
Note: Cgee had an error (code= 104 ).  Results suspect. in: 
gee(formula = event ~ exgr + agegr + indiv + offset(loginterval),

Does anyone knows what is a code=104 error ?

Thanks

Michel

On Wed, 10 Oct 2007, Michel Chavance wrote:
> I am using gee to fit a log-linear marginal model to grouped data. I
> get sensible results unfortunately followed by this warning
>
> Warning message:
> Note: Cgee had an error (code= 104 ).  Results suspect. in:
> gee(formula = event ~ exgr + agegr + indiv + offset(loginterval),
>
> Does anyone knows what is a code=104 error ?
Anyone who reads the source code does.  Look in gee/src/ugee.h.

-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
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