Dear Daniel, thanks again for the quick reply
Just to understand it correctly,
function[x_?NumericQ, y_?NumericQ, z_?NumericQ] := ...
And then, when guessing e.g. x, I use
NMinimize[{(function[x, 1,2] -70)^2, 3 < x < 4}, {x, 3, 4}]
?
Because this doesn't work. However, before going into detail, as written in the Link, the solution
NMinimize[{Hold[(function[x,1,2] - 70)^2, 3 < x < 4}, {x, 3, 4}]
NMinimize[{Hold[(function[x,1,2 ] - 70)^2, 3 < x < 4}, {x, 3, 4}]
gives me twice the same result, even my simulation has (more then one) propabilistic effect in it.
I assume hold is the reason? But again, no idea why
I'll now try to build a minimal example to represent my problem
