The nonlinear least squares benchmarks are a different issue entirely. There are an extremely wide variety of types of problems in the set of 27, and, as some of the authors note, some of these present great difficulty even for high quality programs. As such, it seems unlikely that any program could replicate the certified results in all of these. In a few other cases, minor changes are called for, while in a few others, a bit of creativity is required to obtain the solution. Only one of the 27 problems defies solution.
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To use any of these, just highlight the relevant portion of this text, then Copy the text in the Edit menu. Reset from the main menu to make sure that there will be no variable conflicts or incorrect sample settings. Then, just select the the READ, data, and analysis command in the editor, and press GO to carry out the test.