I wrote an application that does Levenberg Marquardt fitting on a measured power spectrum (that should be a lorentzian). In LV6.1 this application worked perfectly. Even if the initial guess coefficients were very different from the actual coefficients, the algorithm would find the right values. Recently, I started running the application in LV7, and now, the fitting doesn't work anymore. No matter the number of iterations, the found coefficients are always (almost) equal to the guess coefficients and not to the actual coefficients. Even if I set the guess coefficients very close to the actual coefficients, it sticks to the guess coefficients. Did anyone else have similar problems? Does someone know a solution to this problem?
