I am getting the warning in the post subject when attempting to optimize a function in Python with the scipy.optimize.fmin_bfgs function. The complete output:
Warning: Desired error not necessarily achieveddue to precision loss
Current function value: nan Iterations: 1 Function evaluations: 18 Gradient evaluations: 3
It is not a fatal error, I am getting answers, but they are far from the optimum I search.
Are there any typical "noob" errors that might generate this error? I started working with this package only yesterday; as it is, I'm not even sure where to start looking. Any help is appreciated!