When I load a struct, why does it change a variable in the workspace?

Hi,

I am trying to run repeatedly a code that was given to me, using a while loop. Every time the loop runs, this code (femjr) clears all variables, then generates new variables. I have been 1.) loading a structure "fdat", 2.)populating fdat with output data, and 3.)saving fdat during each run of the loop. However, I realized that when I load fdat, at least some of the output variables from femjr get over-written. Why does this happen?

All fields in fdat were initialized at the beginning of my code.

Loop:

if true
  % while fdat.iii<=fdat.sz
  iname=fdat.iname{iii};
  save('iname')
  femjr
  load('fdat')
  iii=fdat.iii;
  fdat.u{iii}=solution_vector;
  fdat.x{iii}=0:1/(dof_num-1):1
  fdat.E(iii)=energy;
  iii=iii+1;
  fdat.iii=iii;
  save('fdat')
  end
end

[Walter Roberson]

Is femjr a function or a script? Does it use assignin()?

Why do you expect that variables in fdat will not overwrite values in the workspace? That is what load() is defined to do when you use it in that form.