when calling this ndso function getting this error? what can we infer from this?

function [ps,s_ord]=ndso(p,ord)

Output argument "s_ord" (and maybe others) not assigned during call to
"C:\Users\Arunachalam\Documents\MATLAB\TEC\ndso.m>ndso".

Error in testga (line 159)

[nds_sol_local,nds_sol_order]=ndso(mat_mut_final,mut_order);

this function works well for some iteration. but for larger iteration i get this error what might be the reason cant able to figure it out

[Walter Roberson]

ndso is not a Mathworks provided routine and is not part of the File Exchange. I do not find it when I search Google either. You will need to provide the source for us to look at.