parfor error in fucntion call

I am executing the following code

function batch_rtokada

...  

parfor k=1:N
  [l(k) L2(k) S(k) Mo(k) M(k) V(k)]=rtokada(w,out,run,ID(k),sta,l(k),G,GSF);
end

and receive the following error

Error using parallel_function (line 589)

Undefined function or variable 'G'.

Error stack:
batch_rtokada>(parfor body) at 36
Error in batch_rtokada (line 35)
parfor k=1:N

But the variable G has been laoded before and indeed exists and does not change in the loop it's always the same for every call to rtokada()

Help?

Answer 1

[Image Analyst]

Set a breakpoing on line 589. When it stops there, type G onto the command line. Then tell me what you see. What is G? Is it a double array? An integer scalar? A string? A structure? A cell array? What in the heck is it???