Pipeline Pilot does not have a built-in cumulative distribution function but I found the below procedure to calculate it on Wikipedia (https://en.wikipedia.org/wiki/Normal_distribution#Cumulative_distribution):

The Pascal code is easily translated into Pilotscript but how many iterations are needed? I tried a few numbers in the script below

cdf_input := 1.0;

iterations := '10,100,1000,10000,100000';

expand(',', iterations);

resize(results, 0);

resize(digit, 0);

for #i in 1 .. numvalues(iterations) loop

  // calculate CDF function for cdf_input

  #value := cdf_input;

  #sum := cdf_input;

  #counter := 1;

  while #counter <= iterations[#i] loop

    #value := ((#value * cdf_input * cdf_input) /((2*#counter) + 1));

    #sum := #sum + #value;

    #counter++;

  end loop;

  #CDF := 0.5 + (#sum/sqrt(2.0*pi()))*exp(-(cdf_input*cdf_input)/2);

  append(results, format('%.50f', #CDF));

  append(digit, floor(-log10(#value)));

end loop;

with the following results, i.e. anything more than ~100 iterations won't change the value.