Using log in a Catalyst.jl system combined with Measurements.jl produces an error in "P7_sens_uncert/uncert_intro.jl".
The cause seems to be Catalyst forces the use of NaNMath.jl methods for some functions under the hood, which have no method defined for data types outside of Base, such as Measurements.Measurement.
I've added the following duct tape solution to fix this
Catalyst.ModelingToolkit.NaNMath.log(x::Measurement) = Measurements.log(x)
but it should be removed as soon as the problem has been patched out by Catalyst itself