Hi, I am new to this forum and this is actually the first time that I use Apache Commons Math. I would like use NelderMead class (in optimization.direct package) for minimizing the parameters of the function that I wrote (which implements MultivariateRealFunction). As you know, a call to optimize method in NelderMead should be caught for three different exceptions, namely FunctionEvaluationException, IllegalArgumentException and OptimizationException. However the last one (OptimizationException) has been apparently deprecated in version 2.2 (to be removed in 3.0). I am using the last version of Appache.Commons.Math which is apparently 2.2. (although I see a Javadoc CommonsMath 3.0 snapshot on the website which is confusing, as there is no sourcecode/jar for version 3.0) and since I am using Eclipse, I can clearly see that OptimizationException is visibly deprecated. However (as expected) the compiler does not complain about it and the program compiles and only at run time the following exception is thrown: Exception in thread "AWT-EventQueue-0" java.lang.NoClassDefFoundError: org/apache/commons/math/optimization/OptimizationException It seems that OptimizationException class cannot be found! Usually, when a class is deprecated, it is still possible to use it (although not recommended). Beside, I have no choice but to use it (call to NelderMead.optimise requires to catch this exception). I greatly appreciate if you can please provide me with your feedbacks. Alternatively, I assume having the version 3.0 (if available) can solve my problem as well. Thank you, Babak ---------------------------------- My code is simple and pretty straightforward as in the following: NelderMead apacheNelderMead = new NelderMead(); MyMultivariateRealFunction minFunct = new MyMultivariateRealFunction(); double[] start = new double[48]; Arrays.fill(start, 0.1); try { minValue = apacheNelderMead.optimize(minFunct, GoalType.MINIMIZE, start); } catch ( FunctionEvaluationException e) { System.out.println(e); } catch (IllegalArgumentException e) { System.out.println(e); } catch (OptimizationException e) { System.out.println(e); } --------------------------------------------------------------------- To unsubscribe, e-mail: user-unsubscribe@commons.apache.org For additional commands, e-mail: user-help@commons.apache.org