st: Diagnostic Plost for 3SLS?

[Nomoreno <nomorenook@netscape.net>]

Hi Stata-List users,

I conducted 3SLS for my data, and I would like to use diagnostic plots 
to investigate my data. However, none of the diagnostic plots commands 
work after 3SLS regression in STATA. The error message is that "The last 
estimates are not found", or something like that. Does anyone know if I 
can do diagnostic plots under 3SLS?

Thank you very much and I appreciate your information.

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