sqp failures

[Julien Bect]

Dear maintainers,

I'm getting lots of errors with sqp() in Octave 3.7.7+, on problems that 
were solved properly in Octave 3.6.4.

The error that I get is the same error that is discussed in these two 
(redundant ?) open bug reports :

https://savannah.gnu.org/bugs/?38875
https://savannah.gnu.org/bugs/?32717

In short : qp() fails with INFO=6 (and therefor lambda is empty).

The following threads are also relevant :

http://octave.1599824.n4.nabble.com/SQP-Fix-td4658006.html
http://octave.1599824.n4.nabble.com/strange-errors-usig-sqp-td4652522.html

Unfortunately, I am not able to provide a self-contained example at the 
moment... (but I will try later).

I will try to bisect to find the cause of the problem.

Has anybody else observed failures of sqp (in fact, qp) on problems that 
were properly solved in 3.6.4 ?

@++
Julien