Alice(Libo) Sun
 
> Really appreciate your response to my question. You are 
> absolute right at suggesting me reading Statlist FAQ before 
> posting messages. I also change Microsoft settings and hope 
> the winmail.dat problem is fixed. 
No, it's not. Your winmail.dat file is still attached. See
the Statalist archives. 
> I checked again following your suggestion.I found out that I 
> was using  'regress Y x1, cluster(ID)'. The option of cluster 
> gives me the trouble.
> 
> Thanks again for your help. This is my first time using "set 
> trace on"; and it is quite useful.
OK. 
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