lsqnonlin function error confusion

Hi, I was running this code and it was working well but when I made small modifications it stopped working. Any help or clarification is appreciated! See code and error below:

function [R] = optimize_radius (raw_EM_cath)
numcath = size(raw_EM_cath,2);

for i = 1:numcath 
    raw_EM_cath(i).cath = raw_EM_cath(i).cath(8:end,:);
    center = lsqnonlin(@(point)distance(point, raw_EM_cath(i).cath), [median(raw_EM_cath(i).cath(:,1)), median(raw_EM_cath(i).cath(:,2)), median(raw_EM_cath(i).cath(:,3))]);
    d = pdist2(center, raw_EM_cath(i).cath);
    R(i, :) = [ mean(d), std(d), median(d), mode(d) ];
end
end

ERROR:

Output argument "d" (and maybe others) not assigned during call to
"optimize_radius>distance".

Error in optimize_radius>@(point)distance(point,raw_EM_cath(i).cath) (line 12)
    center = lsqnonlin(@(point)distance(point, raw_EM_cath(i).cath),
    [median(raw_EM_cath(i).cath(:,1)), median(raw_EM_cath(i).cath(:,2)),
    median(raw_EM_cath(i).cath(:,3))]);

Error in lsqnonlin (line 196)
            initVals.F = feval(funfcn{3},xCurrent,varargin{:});

Error in optimize_radius (line 12)
    center = lsqnonlin(@(point)distance(point, raw_EM_cath(i).cath),
    [median(raw_EM_cath(i).cath(:,1)), median(raw_EM_cath(i).cath(:,2)),
    median(raw_EM_cath(i).cath(:,3))]);

Caused by:
    Failure in initial objective function evaluation. LSQNONLIN cannot continue.

[Walter Roberson]

what shows up for

which -all distance

[Robert Smith]

built-in (C:\Program Files\Matlab\R2017a\toolbox\matlab\ops\@double\all) % double method

[Walter Roberson]

There should not be a space between the dash and the "all". Not

which - all distance

But

which -all distance

[Robert Smith]

Oh, forgive me. Here is the output:

distance is a Java method % java.awt.Point method distance is a Java method % java.awt.geom.Point2D method