Discovered by chance:
Probing the manual example for a two-boundary problem where the function
grwanp (v1,v2,x1,x2,xf,D,load1,load2,score) is used produced an error message. The function provides the missing values at either boundary, if one has estimation values. In MathCad 2000 this function applied to the given example worked well, but in MathCad 13 the error message:
"This function cannot be used here" bothered me.
I guess this function is not implemented within one of the libraries, altough it is listed within the function call menu !!
Does anybody know more about it ?