st: robutst estimation after cnsreg

["Euler P. G. de Mello" <euler@cedeplar.ufmg.br>]

Dear StataListers,
After runing a constrained regression -cnsreg- and testing its validity, 
-whitetst- indicated that a robust estimation is needed. I would like to know 
how could such estimation be done using -cnsreg-? 
Thank you all beforehand for any help or suggestions.
Euler 
Ps.: My apologies in case I've overlooked anything in the manuals
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