Problem when calling getOutputDerivatives from FMU3Slave

[Tapisama]

https://github.com/CATIA-Systems/FMPy/blame/2196d875a753aee804df46f1b632bdfd4f4c8831/fmpy/fmi3.py#L999

Aparently, the call made from the referenced line is missing an argument. That would be the lenght of the resulting value array.

The definition of the official interface function at the beginning of the class definition seems to be correct (as defined by the standard) . And when running it, it finds the function in my fmu. But of course, when making this call it fails.

I don't feel like this could be an error on my end, but I would appreciate some confirmation as I'm generating my own FMUs and I was using fmpy as a validation tool.

Thank you for your time.