st: qreg: alternate solution exists

["Kyle Caswell" <caswellk83@hotmail.com>]

Hello.  I have been running quantile regressions (p25 p50 p75) using the 
qreg command.  In the iteration log, I get the following note (several 
times) sandwiched in between the usual reported sum of absolute weighted 
deviations: "note: alternate solution exists"

The following official STATA web-site, explaining the qreg command, displays 
a regression log with same "note": 
http://www.stata.com/capabilities/qreg.html

Can someone tell me:

(1) What does this mean, explicitly?

(2) When one receives this message, can the resulting output be considered 
O.K., insofar as any quantile regression result which converges is O.K.?  Or 
is this an indication that the coefficients from the model shouldn't be 
trusted?

I appreciate any feedback.

best,

-kyle 

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