MINPACK error with PiecewiseConstantParameter class

Posted by javit on Aug 31, 2009; 3:28pm
URL: http://quantlib.414.s1.nabble.com/MINPACK-error-with-PiecewiseConstantParameter-class-tp7946.html

I'm having problems with a piecewise constant parameter optimization. I'm getting

MINPACK: improper input parameters

Still digging the code to find out what the problem is.

Would you share an example of a succesfull optimization with PiecewiseConstantParameter class?

Thank you,
Javit